ROMENSKY, A. A. From Enemies to Allies: the Mystery of Prince Oleg’s Campaign against Constantinople. Studia Ceranea, [S. l.], v. 11, p. 697–719, 2021. DOI: 10.18778/2084-140X.11.37. Disponível em: https://czasopisma.uni.lodz.pl/sceranea/article/view/13138. Acesso em: 25 apr. 2024.