WOLIŃSKA, Teresa. Varangian in Byzantium. Harald Hardraade’s Sicilian adventure. Balcanica Posnaniensia. Acta et studia, [S. l.], v. 15, p. 65–86, 2009. DOI: 10.14746/bp.2009.15.7. Disponível em: https://pressto.amu.edu.pl/index.php/bp/article/view/53087. Acesso em: 4 aug. 2026.