“Supplementary (additional) Exploration Prospects for the Upper Viséan Gas-Condensate Pools of Kotelevske Field”. Visnyk of V. N. Karazin Kharkiv National University. Series Geology. Geography. Ecology 39, no. 1084 (December 5, 2013): 95–98. Accessed October 25, 2026. https://periodicals.karazin.ua/geoeco/article/view/7563.