Lyashenko, Vasil, Oleh Khomenko, Tatiana Chekushina, and Fedor Topolnij. 2020. “Justification of Safe Underground Development of Mountain Deposits of Complex Structure by Geophysical Methods”. Technology Audit and Production Reserves 5 (3(55):9-18. https://doi.org/10.15587/2706-5448.2020.215737.