“Angular parameters of undermined ground movement process in unknown areas: Određivanje uglovnih parametara procesa pomeranja potkopanog terena na rudnicima sa neizučenim procesom”, ume, no. 19, pp. 125–136, Dec. 2011, Accessed: Nov. 04, 2026. [Online]. Available: https://ume.rgf.bg.ac.rs/index.php/ume/article/view/88