DRAGNEA, Mihai. Conquest, holy war, and crusade. The plan of the military campaign against the Slavs. A new interpretation of the so-called Magdeburg Letter of 1108. Slavia Antiqua. Rocznik poświęcony starożytnościom słowiańskim, [S. l.], n. 65, p. 247–262, 2024. DOI: 10.14746/sa.2024.65.11. Disponível em: https://pressto.amu.edu.pl/index.php/sla/article/view/45015. Acesso em: 24 lis. 2024.