Dernov, Vitaly. “New Finds of the Carboniferous Cephalopods on the Territory of Ukraine”. Visnyk of V. N. Karazin Kharkiv National University. Series Geology. Geography. Ecology, no. 55 (December 1, 2021): 72-81. Accessed December 11, 2025. https://periodicals.karazin.ua/geoeco/article/view/18390.