HOJDIS, Bogdan. The life and problems connected with Władysław Warneńczyk (of Varna) in the literary creation of Leopold Kielanowski. Balcanica Posnaniensia. Acta et studia, [S. l.], v. 8, p. 201–208, 1997. DOI: 10.14746/bp.1997.8.17. Disponível em: https://pressto.amu.edu.pl/index.php/bp/article/view/54697. Acesso em: 8 aug. 2026.