SHAKIROV, Zufar Gumarovich; BAGAUTDINOV, Almaz Rafaelevich. To The Question Of Urbanization In The Territory Of The Pre-Mongol Volga Bulgaria. Revista Publicando, "Quito, EC", v. 4, n. 13 (3), p. 992–1000, 2017. Disponível em: https://revistapublicando.org/revista/index.php/crv/article/view/1022. Acesso em: 8 jan. 2025.