Chernikh, A.V., and M.S. Kamenskikh. “Traditional Culture of Russians in Areas of Active Interethnic Contacts in the Urals and the Volga Region: Results of a Research Project”. Perm Federal Research Centre Journal, no. 1, Apr. 2021, pp. 74-80, https://doi.org/10.7242/2658-705X/2021.1.7.