VAIMAN, D.I. Bulgarians of the Perm Region during «the Great Terror»: «Dobrynkaya folder». Perm Federal Research Centre Journal, [S. l.], n. 4, p. 82–95, 2021. DOI: 10.7242/2658-705X/2021.4.8. Disponível em: https://journal.permsc.ru/index.php/pscj/article/view/PSCJ2021n4p8. Acesso em: 13 may. 2026.