Harasymchuk, Vasyl, Halyna Medvid, and Tatiana Solovey. “Gas-Hydrogeochemical Conditions of the Bilche-Volytsia Oil-Gas-Bearing Area (Carpathian Foredeep, Ukraine)”. Visnyk of V. N. Karazin Kharkiv National University, series "Geology. Geography. Ecology", no. 55 (December 1, 2021): 37-51. Accessed May 3, 2024. https://periodicals.karazin.ua/geoeco/article/view/18388.