KYSELEVYCH, L. “GLIADIVSKA STRATA: PROBLEMS OF THE ESTABLISHMENT AND VALIDY”. Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 33 (February 10, 2025): 36–39. Accessed February 15, 2026. https://geology.bulletin.knu.ua/article/view/3533.