“Micropaleontological characteristics of the campanian-maastrichtian sediments in the Oskol river basin” (2016) Visnyk of V. N. Karazin Kharkiv National University. Series Geology. Geography. Ecology, (44), pp. 35–44. Available at: https://periodicals.karazin.ua/geoeco/article/view/7490 (Accessed: 25 October 2026).