GIZA, Antoni. The Neo-Slavic Congress in Sofia in 1910 and its importance for Neo Slavism in Bulgaria. Balcanica Posnaniensia. Acta et studia, [S. l.], v. 6, p. 111–124, 1993. DOI: 10.14746/bp.1993.6.8. Disponível em: https://pressto.amu.edu.pl/index.php/bp/article/view/54897. Acesso em: 5 nov. 2026.