SPREMIĆ, Momčilo. The Serbian despot George Branković and the battle of Varna in 1444. Balcanica Posnaniensia. Acta et studia, [S. l.], v. 8, p. 39–50, 1997. DOI: 10.14746/bp.1997.8.4. Disponível em: https://pressto.amu.edu.pl/index.php/bp/article/view/54684. Acesso em: 8 aug. 2026.