CHERNYKH, A.V. The history of the bulgarians of prikamye in 1920-1930-s based on the archival investigation files materials. Perm Federal Research Centre Journal, [S. l.], n. 2, p. 89–96, 2020. DOI: 10.7242/2658-705X/2020.2.9. Disponível em: https://journal.permsc.ru/index.php/pscj/article/view/PSCJ2020n2p9. Acesso em: 14 may. 2026.