Тафаев, Г., & Юдина, И. (2010). Ордынская трансформация древнечувашской цивилизации (1243 – 1552 гг.). Vesnik of Brest University. Series 2. History. Economics. Law, (2), 5–11. Retrieved from https://journal.brsu.by/index.php/history/article/view/1629