“Underground mining exploration in the ’Lajkovača’ copper deposit in Valjevo-Kosjerić: Jamski istražni radovi u ležištu bakra ’Lajkovača’ Valjevo-Kosjerić”, ume, no. 23, pp. 1–9, Dec. 2013, Accessed: Nov. 14, 2026. [Online]. Available: https://ume.rgf.bg.ac.rs/index.php/ume/article/view/46