“Coal reserves in the deposit as a limiting factor for the introducing of mechanised mining technology: Rezerve uglja u ležištu kao ograničavajući faktor uvođenju tehnologija mehanizovanog otkopavanja”, ume, no. 23, pp. 21–31, Mar. 2017, Accessed: Nov. 04, 2026. [Online]. Available: https://ume.rgf.bg.ac.rs/index.php/ume/article/view/48