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 [Internet]. 2013 Dec. 31 [cited 2026 Nov. 4];(23):59-68. Available from: https://ume.rgf.bg.ac.rs/index.php/ume/article/view/51