Шевчук, О. А. “Biostratigraphy of the Middle Jurassic of Central and Eastern Platform Ukraine”. Visnyk of V. N. Karazin Kharkiv National University, series "Geology. Geography. Ecology"0, no. 45 (March 21, 2017): 86-99. Accessed December 22, 2024. https://periodicals.karazin.ua/geoeco/article/view/8216.