Vendina, Olga. “Urban Responses to the Challenge of Ethnic and Cultural Diversity (Perm, Ufa, Rostov-on-Don)”. Gosudarstvennaya Sluzhba, vol. 18, no. 6, Nov. 2016, pp. 74-80, https://gosudarstvennaya-sluzhba.owebs.ru/article/view/22364.