ZHEKOVA, Mariyanka B. The celebration of the Day of Saints Cyril and Methodius in Bulgaria: the transformation of a religious holiday to a school and national one. Balcanica Posnaniensia. Acta et studia, [S. l.], v. 17, p. 225–230, 2010. DOI: 10.14746/bp.2010.17.16. Disponível em: https://pressto.amu.edu.pl/index.php/bp/article/view/52468. Acesso em: 5 aug. 2026.