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Упит dcterms_creator_txt:Ivanović R.

791 items

  • Fluid inclusion systematics in the Okoška gora polymetallic deposit

    Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec (2021)
    ... Gradec. Federal Geological Survey Belgrade, 74 pp. Schmid, S. M., Fiigenschuh, B., Kounov, A., Matenco,L., Nievergelt, P.. Oberhinsli, R., Picuge Schefer, S., Schuster, R., Tomljenovič, B., Ustaszewski, K.. & van Hinsbergen, U. 3. J, 2 Tectonic units of the Alpine collision zone between Eastern Alps and ...
    ... connections between peri-Gondwanan domainsofcentral Eur International Journal ofEarth Sciences, 107, 2293-2315, | Šoster, А., Хамацик,Ј., O'Sullivan, Р., Непес, U., Potočnik Krajnc, B.,1 Dolenec, M. 2020: Geochemistry of the Bashibos-Bajrambos Serbomacedonian massif, North Macedonia: Implications for ...
    ... concluded that they are primary, based on the fact that :semblages follow the growth zones ofthe host crystal. Secondary (Q1) inclusions are rouhd r jrregularly ameboid and their assemblages are generally oriented in linear formš, sgardless ofthe crystal shape. Inclusions in both assemblages are generally ...

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака

    Зоран Гојковић (2023)
    Површински коп, као систем који обезбеђује енергетску стабилност или снабдевање сировинама које су од изузетне важности за привредни напредак, својим функционисањем утиче на околна насељена места. Међу бројним аспектима овог утицаја, може се издвојити издвојити и анализирати утицај вертикалних и хоризонталних померања која се јављају на површи терена. Мониторинг вертикалних и хоризонталних померања површи терена околних насељених места треба да има што бољу временску резолуцију (временски период између праћења деформација) како би се вертикална и хоризонтална померања контролисала и ...
    Сентинел 1 интерферометрија, слегање, Перманентни скатерери, Костолац

  • Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model

    Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak (2024)
    The Majdanpek open pit mine south district is currently active mining prospect of copper ore exploitation in eastern Serbia. Its depth is approaching the termination depth and occurrences of large-scale instabilities and global instability of the final pit slope is possible. These can generate catastrophic mass movement inside an area that encloses a regional road route and the Pek River bed which is channelled along the outer contour of the pit. The displacements that were noted in early 2023, in the ...
    displacement, survey, inverse velocity, open pit

  • Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2

    Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)
    Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... Int. Ed., 2007, 46, 9062–9064. 22 R. E. Aird, J. Cummings, A. A. Ritchie, M. Muir, R. E. Morris, H. Chen, P. J. Sadler and D. I. Jodrell, Br. J. Cancer, 2002, 86, 1652–1657. 23 I. Ott and R. Gust, Arch. Pharm. (Weinheim, Ger.), 2007, 340, 117–126. 24 S. E. Pierce, R. Kieltyka, H. F. Sleiman and J. S ...
    ... Biochim. Biophys. Acta, 1983, 747, 93–99. 46 Q. Liu, Y. Qu, R. Van Antwerpen and N. Farrell, Biochemistry, 2006, 45, 4248–4256. 47 M. Jensen and W. Nerdal, Eur. J. Pharm. Sci., 2008, 34, 140–148. 48 G. Speelmans, W. H. H. M. Sips, R. J. H. Grisel, R. W. H. M. Staffhorst, A. M. J. Fichtinger-Schepman, J ...
    ... V. Amani, M. Yousefi and H. R. Khavasi, Acta Crystallogr., Sect. E: Struct. Rep. Online, 2008, 64, m905–m906. 29 T. Togano, N. Nagao, M. Tsuchida, H. Kumakura, K. Hisamatsu, F. S. Howell andM.Mukaida, Inorg. Chim. Acta, 1992, 195, 221–225. 30 B. Fuchs, J. Schiller, R. Süb, M. Schürenberg and D. ...

  • Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)

    Ana Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković (2019)
    In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...
    Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinica

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... German Hungarian Irish Italian Slovenian (JSI)Slovenian (ISJFR) Spanish Slovenian Portuguese Russian Number of tokens in R1 N um be r o f t ok en s in R 2 0 5000 10000 15000 20000 25000 5000 10000 50000 100000 Figure 3: Correlation between number of tokens Table 3 represents the results ...
    ... con Model for Ontologies: Community Report. Dahlerup, V. (1918). Ordbog over det danske sprog, vol- ume 1. Gyldendal. Dandala, B., Mihalcea, R., and Bunescu, R. (2013). Word sense disambiguation using Wikipedia. In The People’s Web Meets NLP, pages 241–262. Springer. Dónaill, N. O. and Maoileoin ...
    ... Darmstadt, January. Moro, A., Li, H., Krause, S., Xu, F., Navigli, R., and Uszko- reit, H. (2013). Semantic rule filtering for web-scale re- lation extraction. In International Semantic Web Confer- ence, pages 347–362. Springer. Navigli, R. and Ponzetto, S. P. (2012). BabelNet: The automatic construction ...

  • Using Lexical Resources for Irony and Sarcasm Classification

    Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković (2017)
    The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...
    ... Table 2. Table 2: Results of Irony classification on Twitter data. feature P R F1 acc set FS1 POS, OSA, M 0.504 0.530 0.517 0.817 FS2 R, OSA, M 0.605 0.486 0.539 0.845 FS3 PSP, POS, OSA, M 0.616 0.473 0.535 0.849 FS4 R, PSP, POS, OSA, M 0.658 0.458 0.540 0.856 FS5 PPR, POS, OSA, M 0.670 0.458 0.544 ...
    ... the help Table 3: Results of Sarcasm classification on Twitter data. feature P R F1 acc set FS1 POS, OSA, M 0.274 0.240 0.256 0.709 FS2 R, OSA, M 0.267 0.212 0.236 0.715 FS3 PSP, POS, OSA, M 0.280 0.235 0.256 0.715 FS4 R, PSP, POS, OSA, M 0.283 0.198 0.233 0.728 FS5 PPR, POS, OSA, M 0.273 0.203 0.233 ...
    ... tags in a tweet and irony markers (R, OSA, M) increased precision, but lowered recall. In the third experiment, adding the polarity of positive sentiment words (PSP) improved the results, which was also the case with the fourth experiment, where antonymous pairs (R) were added as a feature and the c ...

  • Geostatički proračuni sanacije klizišta šipovima

    Slobodan Ćorić, Dragoslav Rakić, Dušan Berisavljević (2019)
    U ovom radu su, polazeći od rezultata geotehničkih istraživanja, prikazani geostatički proračuni sanacije klizišta vertikalnim šipovima. Metodologija proračuna je složena, jer podrazumeva interakciju klizišta i stabilizirajućih šipova. Stoga se simultano analiziraju stabilnost klizišta i stabilnost šipova. Prilikom određivanja bočne otpornosti tla oko šipova koristi se metoda Brinč Hansena koja uzima u obzir trodimenzionalne uslove u tlu i može da se primeni u složenim geološkim uslovima koji su česti u Srbiji. Analize stabilnosti klizišta vrše se odgovarajućim metodama granične ravnoteže. ...
    sanacija klizišta, interakcija klizišta i šipa, bočna otpornost šipova, stabilnost klizišta i šipova
    ... unutrašnjeg trenja. = Ке = 759 К = 222 р c=1–S 80 g=45'__|--1""T" o=40. ——— ·_,··"' /" 50 — _ | = 40 | ___---81.4 — 40 ____ 272 30 Д И 180 7 Н нег i и e = 20 / Д MO рњ О 80 – и јуч / — m __ ју /_„·–, / / рИ ти / з0г ___ __ —> 61.4 10 2 е 257 р K / — рИИИ li — 9.91 K 40 — 250 —y 36.8 ...
    ... —|s e _J ___M00 __ ______„ljaž 2 РЖИ њ 10 — 5 7___ 40.2 / -_'_________-–·—···""—–"·_– — 1,93 ;zi:: zip 00 __ —18.14 r= 5 1 ___ | _____log? | ) 4»/"_/ К'„' = 0 2а ф = 0% 2 р & a 2 20 0 5 102/B 15 20 2/8 Slika 3. Koeficijent bočnog.pritiska а koji zavisi od kohezije (Brinč Hansen, 1961) ...
    ... se superponiraju otpori tla duž klizne površine i otpori koji su posledica interakcije šipa i okolnog tla. Tako da se faktor sigurnosti Fs s s s s R +HF = D (5) gde je: Rs – otporne sile u klizištu Hs – otporne sile od šipova Ds – - otporne sile, duž - deo kliznog tela, koji je ispred šipova, ...

  • Hibridni sistem za planiranje i analizu ventilacije rudnika

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilacija rudnika, informacioni sistemi
    ... the book ili pomnoženo sa r 0 rr r 2 2 = ∂ θ∂+ ∂ θ∂ . (6.19) Prikazane jednačine definišu promenu temperature θ u pravcu poluprečnika od centralne linije vazdušne struje. Uvođenjem smene: r rs ∂ θ∂= , (6.20) i njenim diferenciranjem po r, dobija se: rr r r s 2 2 ∂ θ∂+ ∂ θ∂= ∂ ∂ ...
    ... 21 r r lnb , (6.27) odakle je:     θ−θ= 2 1 21 r r ln b . (6.28) Vrednost konstante D definišemo iz izraza (6.25), ili )rln(bC 11 −θ= , (6.29) Zamenom izraza za b i C u jednačini (6.24) dobija se: )rln()rln(b 11 θ+=θ , (6.30) odnosno, 1 1 1 1 21 1 1 r r ln ...
    ... prirasta toplote duž pravaca r, Φ i z. Priraštaj unutrašnje energije u elementu duž pravca r određuje se na osnovu razlike toplotnog fluksa koji ulazi u element u pravcu ose r, i fluksa koji izlazi iz elementa u istom pravcu. Osnova elementa u pravcu ose r ima površinu r dΦ dz. Zakrivljenost ove površi ...

  • Palinomorfe sa lokaliteta Gostuška reka (Stara planina)

    Ivan Rutović (2024)
    U radu su prikazani rezultati palinološkog istraživanja permsko-trijaskih sedimenata sa lokaliteta Gostuška reka. Palinološki kompleksi su detaljno analizirani, što je omogućilo morfološku, taksonomsku i paleoekološku identifikaciju palinomorfi. Istraživanje je pokazalo prisustvo velikog broja spora i polena golosemenica, dok je polen skrivenosemenica zastupljen u manjem procentu. Na osnovu paleoekoloških analiza, zaključeno je da je tokom formiranja sedimenata na lokalitetu vladala aridna klima, sa povremenim vlažnim fazama koje su omogućavale razvoj močvarne vegetacije.
    palinomorfe, paleoekologija, perm - trijas, Stara planina, Gostuška reka
    ... (Naumova) R. Pot. & Klaus 1954 Platysaccus papilionis Potonie & Klaus, 1959 Tab. 4, SL. B. 1962 Platysaccus papilionis R. Pot. & Klaus – Grebe & Schweitzer, str. 17, tab. 11, sl, 1 1963 Platysaccus papilionis R. Pot. & Klaus – Klaus, str. 337, tab. 7, sl, 31 1981 Platysaccus papilionis R. Pot. ...
    ... 15-27. https://doi.org/10.1016/j.revpalbo.2013.04.004 35 Gao, R., Zhu, Z., Zheng, G. & Zhao, C. 2000. Palynology of petroliferous basins in China. Petroleum Industry Press, Beijing. 249 p. Garcta-Avila, M., Mercedes-Martinb, R., Juncala, M.A. & and Dieza, J.B. 2020. Some aspects of current ...
    ... Sporen aus dem sudallpinen Perm. — Jahrbuuch der Geologischen Bundesanstalt., 106, Wien, pp. 229 – 361. 36 Marković, R.; Mudelsee, M.; Radaković, M.G.; Radivojević, 4.R.; Schaetzi, R.J.; Basarin, B.; Nikolić, J.; Marković, S.B.; Spalević, P.; 4ntić, 4.; etal., 2024: An Index for Snowmelt- ...

  • Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема

    Никола Живановић, Вукашин Рончевић, Владимир Чебашек, Вељко Рупар, Стеван Ћорлука, Синиша Половина (2022)
    Деградирани шумски екосистеми не пружају довољну заштиту земљишта те су често велике површине захваћене ерозионим процесима. Важну улогу при оцени отпорности земљишта на ерозионе процесе има напон смицања. Истраживано подручје лоцирано је у југозападном делу Београда чије су површине под шумом изложене интензивним ерозионим процесима. Читава површина испресецана је јаругама и плитким клизиштима. Одабрано је 13 профила на јаругама на којима је извршено мерење отпорности земљишта приручним апаратима на три тачке дуж профила (лева обала, јаруга, десна обала) и ...
    Теренско мерење, Ерозија земљишта, Јаруга, Џепна крилна сонда, Џепни пенетрометар

  • Crystal structure of K3EuSi2O7

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu
    ... Loye, A. R. Myers, M. D. Smith, H.-C. zur Loye, CrystEngComm 18 (2016) 2294 (https://doi.org/10.1039/C6CE00177G) 7. A. M. Latshaw, J. Yeon, M. D. Smith, H.-C. zur Loye, J. Solid State Chem. 235 (2016) 100 (https://doi.org/10.1016/j.jssc.2015.12.013) 8. G. Morrison, A. M. Latshaw, N. R. Spagnuolo ...
    ... a starting model for structure refinement. When Er3+ was replaced with Eu3+ the model converged rapidly, and the crystal structure was refined to R = 3.5 %. The structure was refined on F2 by full-matrix least-squares techniques using the programs SHELXL.20 Selected bond lengths and angles are ...
    ... 298 Observed [I> 2σ(I)] reflections 392 a / Å 9.9512 (3) Rint 0.077 c / Å 14.4480 (4) (sin θ/λ)max / Å−1 0.641 α / ° 90 Refinement γ / ° 120 R[F2> 2σ(F2)] 0.035 V / Å3 1239.05 (8) wR(F2) 0.069 Z 6 S 1.13 Radiation type Mo Kα No. of reflections 528 µ / mm−1 9.39 No. of parameters 40 ...

  • Is the Sava-Vardar zone a remnant of an Upper Cretaceous ocen? Pro et contra

    Vladica Cvetković, Dejan Prelević, Ana Mladenović (2024)
    Neotethys, ocean closure, subduction
    ... Matenco, L., Schefer, S., Schuster, R., ... & Ustaszewski, K. (2008). The Alpine-Carpathian-Dinaridic orogenic system: correlation and evolution of tectonic units. Swiss Journal of Geosciences, 101, 139-183. 3. Prelević, D., Wehrheim, S., Reutter, M., Romer, R. L., Boev, B., Božović, M., ... & ...
    ... (FYROM)— Constraints on the final stage of Tethys closure in the Balkans. Terra Nova, 29(3), 145-153. 4. Cvetković, V., Šarić, K., Grubić, A., Cvijić, R., & Milošević, A. (2014). The Upper Cretaceous ophiolite of North Kozara-remnants of an anomalous mid-ocean ridge segment of thc Neotethys. Geologica ...
    ... metallogenic cvolution of the Late Cretaceous arc in the Carpathian- Balkan orogen. 7Tecfonics, 34, 1813-1836. 6. Sokol, K., Prelević, D., Romer, R. L., Božović, M., van den Bogaard, P., Stefanova, E., .. & Čokulov, N. (2020). Cretaceous ultrapotassic magmatism from the Sava-Vardar Zone of ...

  • Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names

    Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2019)
    In this paper we present a rule- and lexicon-based system for the recognition of Named Entities (NE) in Serbian news paper texts that was used to prepare a gold standard annotated with personal names. It was further used to prepare training sets for four different levels of annota tion, which were further used to train two Named Entity Recognition (NER) sys tems: Stanford and spaCy. All obtained models, together with a rule- and lexicon based system were evaluated on ...
    NER, Named Entity Recognition Systems, Serbian, Personal Names
    ... SRPNER achieved the best precision, in all cases (except one) STANFORD NER achieved the best recall, 1065 SPACY NER SRPNER STANFORD NER model P R F1 P R F1 P R F1 S T U D E N T S PERS_1 0.804 0.827 0.815 0.857 0.847 0.852 0.729 0.887 0.800 PERS_3 0.815 0.807 0.811 0.837 0.827 0.832 0.748 0.873 0.806 ...
    ... sults, on texts coming from different sources they obtained the following results: for Croatian P = 0.91, R = 0.93 and F1 = 0.92, higher than STANFORD NER for the model PERS_1, and for Slovene P = 0.82, R = 0.87 and F1 = 0.84, comparable with STANFORD NER for the model PERS_1 (Table 6). One should note, however ...
    ... approximately the same number of personal names as our both sets – around 900. Their results were for STANFORD NER P = 0.72, R = 0.87 and F1 = 0.79, and for SPACY NER P = 0.73, R = 0.73 and F1 = 0.73. Our re- sults are comparable in the sense that they also show that STANFORD NER achieves the best re- ...

  • Identification of the Best Available Renewable Energy Source for Electricity Production in Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    Around 2/3 of electricity production in Serbia originates from coal-fired thermal power plants. The most significant domestic coal deposits are lignite deposits, a type of low -quality coal that causes negative health, climate and environmental impacts during the combustion. To reduce those negative impacts on domestic electricity production and to promote environmental awareness, the Serbian Energy Sector Development Strategy and the National Action Plan for Use of Renewable Energy Sources indicate the plan for increasing the share of ...
    Strategija obnovljive energije, Održiva energija, Proizvodnja električne energije, Solarna energija, Biomasa, Hidroenergije, Energija vetra
    ... Development Strategy and the National Action Plan for Use of Ren ewable En ergy Sources in dicate the plan for in creasing the share of r en ewable energy sou r ces (RES) in electricity production. Serbia is obliged to reach 27% of the gross energy final con sumption prov ided from the RES u ntil ...
    ... publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Abstract A r ound 2/3 of electricity production in Serbia originates from coal-fired thermal power plants. Th e m ost significant dom estic coal deposits are lignite ...

  • Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia

    Оливера Крунић (2021)
    минералне воде

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... D-> 552 d|| _—R — L — j=1 i=1 j=1 jel jcl je1 Mdj XOsj M i=l i=l i=1 Step 3. The degree of possibility of two triangular fuzzy numbers is deter- mined using; the fuzzy number comparison approach: V(M, > W)= sup |min (Jr, () , R,Ma (9))] . z>u If there are such pairs (z,y) that r > y and a (T) ...
    ... relative importance. On the other hand, mathematical optimization calculations are performed apply- ing the fuzzy analytic hierarchy process FAHP [3 r)] to select the optimal mining; echnology. The great advantage of fuzzy logic and heuristic methods need to be empha- sized in connection with ...
    ... l optimization begins with predefined criteria that affect the selection of one of several alternatives. Then a matrix of criterion X is con- C. R. Acad. Bulg. Sci., 76, No 9, 2023 1415 structed with fuzzy numbers assigned by the decision maker (expert) using the FAHP scale. Step 2. An extent ...

  • Отварање и припрема лежишта за примену коморно-стубних метода откопавања

    Никола Станишић (2024)
    Циљ мастер рада је да кроз теоријски преглед и практични пример, прикаже процес отварања и припреме лежишта за примену коморно-стубне методе окопавања. Предмет рада је мало лежиште олово-цинкане руде, а од варијација коморно-стубних метода откопавања, изабрана је коморно-стубна метода етажног откопавања са откопавањем одoздо на доле. Рад се бави темама одабира и описа начина отварања и припреме лежишта, методама откопавања, технологијом израде просторија и откопавања лежишта, организацијом рада и проценом трошкова и економичности експлоатације.
    коморно-стубна метода, отварање, припрема, технологија, откопавање
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  • Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)

    Howard R. Feldman, Barbara V. Radulović, Fayez Ahmad (2023)
    Brachiopods, Middle Jurassic, Sphriganaria, shell microstructure, Ethiopian Province