IVANOV, I. Bulgarians, Cumans, Teutons, and Vlachs in the First Decades of the Thirteenth Century. Studia Ceranea. Journal of the Waldemar Ceran Research Centre for the History and Culture of the Mediterranean Area and South-East Europe, [S. l.], v. 12, p. 491–505, 2022. DOI: 10.18778/2084-140X.12.05. Disponível em: https://czasopisma.uni.lodz.pl/sceranea/article/view/14553. Acesso em: 22 mar. 2023.