Кузнецов, П.Ю., Гриб, Н.Н. and Гриб, Г.В. 2019. Determination of coal rock strength properties according to geophysical well survey ( the South-Yakut coal basin). Proceedings of Voronezh State University. Series: Geology. 1 (Jan. 2019), 82-87. DOI:https://doi.org/10.17308/geology.2019.1/1720.