Prokopenko, Y. A., & Прокопенко, Ю. А. (2018). Finds of European coins of 15th-18th centuries in the central part of the northern caucasus(Review) [Descoperirile de monede europene din sec. XV-XVIII În centrul regiunii Caucazului de Nord]. High Anthropological School University.
Chicago-referens (17:e uppl.)Prokopenko, Y. A., och Ю. А Прокопенко. Finds of European Coins of 15th-18th Centuries in the Central Part of the Northern Caucasus(Review) [Descoperirile De Monede Europene Din Sec. XV-XVIII În Centrul Regiunii Caucazului De Nord]. High Anthropological School University, 2018.
MLA-referens (8:e uppl.)Prokopenko, Y. A., och Ю. А Прокопенко. Finds of European Coins of 15th-18th Centuries in the Central Part of the Northern Caucasus(Review) [Descoperirile De Monede Europene Din Sec. XV-XVIII În Centrul Regiunii Caucazului De Nord]. High Anthropological School University, 2018.