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The physical-mechanical characteristics of coal seams of immediate floor and roof influences on the choice of excavation system in the coal deposit in Serbia https://www.unibl.org/sr-lat/fis/zaposlen/1442-jelena-trivan https://www.unibl.org/sr-lat/fis/zaposlen/1443-drazana-tosic /unibl/author/Vladimir Todorović 2020-10 Academic Article text 44 37 /unibl/sci/idNaucniRad:26822 622.274.5:622.33.013 (497.11) https://dx.doi.org/10.7251/afts.2020.1223.037T https://rf.unibl.org https://rf.unibl.org АРХИВ ЗА ТЕХНИЧКЕ НАУКЕ 2233-0046 АРХИВ ЗА ТЕХНИЧКЕ НАУКЕ 2233-0046 http://www.arhivzatehnickenauke.com/new/2020-godina/arhiv-br-23/rudarstvo/ Ј. Триван, D. Tošić, В. Тодоровић, The physical-mechanical characteristics of coal seams of immediate floor and roof influences on the choice of excavation system in the coal deposit in Serbia, АРХИВ ЗА ТЕХНИЧКЕ НАУКЕ, Vol. 5, No. 23, pp. 37 - 44, Oct, 2020 https://www.pub.unibl.org/s/cir/item/38061