LESZKA, Mirosław. The question of the so-called uprising of Konstantin and Fruzhin in Bulgarian scholarship. Balcanica Posnaniensia. Acta et studia, [S. l.], v. 21, p. 5–12, 2014. DOI: 10.14746/bp.2014.21.1. Disponível em: https://pressto.amu.edu.pl/index.php/bp/article/view/1414. Acesso em: 25 apr. 2024.