Стебельська, Г. Я. “Geologic Conditions of Prospecting and Development of High Viscocity Oils and Natural Bitumen”. Visnyk of V. N. Karazin Kharkiv National University. Series Geology. Geography. Ecology 38, no. 1049 (October 21, 2015): 53-57. Accessed December 15, 2025. https://periodicals.karazin.ua/geoeco/article/view/7669.