BOIKO, Oleksandr, Antonín KUNZ, Martin KLEMPA, and Petr BUJOK. “COMPARATIVE ANALYSIS OF THE GAS SECTOR IN UKRAINE AND THE CZECH REPUBLIC”. GeoScience Engineering 65, no. 4 (December 16, 2019): 92–96. Accessed April 19, 2024. http://geoscience.cz/ojs/index.php/GSE/article/view/272.