Usenko, O. “Conditions of Ferruginous-Cherty Formations Origin (Middle-Dnieper Mega-Block)”. Geofizicheskiy Zhurnal 37, no. 1 (February 1, 2015): 21–41. Accessed May 21, 2025. https://journals.uran.ua/geofizicheskiy/article/view/111321.