ISHCHENKO, I., and L. YAKUSHYN. “EVOLUTION OF THE SEDIMENTATION CONDITIONS IN CRETACEOUS IN THE AREA OF THE NORTH-WESTERN SHELF OF THE BLACK SEA”. Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 43, Sept. 2024, pp. 20-22, https://geology.bulletin.knu.ua/article/view/2932.