“Testing of the resistance towards the cutting of the coal mass by the mechanical means on the example of deposit ’Kostolac’: Ispitivanje otpora prema rezanju ugljene mase mehaničkim sredstvima na primeru ležišta ’Kostolac’”, ume, no. 23, pp. 59–68, Dec. 2013, Accessed: Nov. 04, 2026. [Online]. Available: https://ume.rgf.bg.ac.rs/index.php/ume/article/view/51