@ARTICLE{
author={Trivan Jelena,Tosic Drazena,Todorovic Vladimir},
year={2020},
title={The Physical-Mechanical Characteristics of Coal Seams of Immediate Floor and Roof Influences on the Choice of Excavation System in the Coal Deposits in Serbia},
journal={ARCHIVES FOR TECHNICAL SCIENCES},
volume={},
number={23},
pages={37-44},
document_type={Article},
}