Zagnitko, V., and V. Mykhailov. “UKRAINE’S SHALE BEARING STRATA GAS: GEOCHEMICAL FEATURES”. Visnyk of Taras Shevchenko National University of Kyiv. Geology 1, no. 64 (January 16, 2025): 11–18. Accessed February 14, 2026. https://geology.bulletin.knu.ua/article/view/1770.