Савко, Константин Аркадиевич, and Сергей Владимирович Цыбуляев. “U-PB Isotope Age and Tectonic Position of the Paleoproterosoic Andesite Porphyrites, Kursk Block, Eastern Sarmatia”. Proceedings of Voronezh State University. Series: Geology0, no. 3 (September 27, 2018): 29-35. Accessed December 16, 2025. https://journals.vsu.ru/geology/article/view/1559.