KLEJN, Zbigniew. The dispute over the origins of the Proto-Bulgarians and Gagauz . Balcanica Posnaniensia. Acta et studia, [S. l.], v. 14, p. 67–74, 2007. DOI: 10.14746/bp.2007.14.6. Disponível em: https://pressto.amu.edu.pl/index.php/bp/article/view/52829. Acesso em: 5 aug. 2026.