Pychowski, Michał Witold. “Strange Crusader Adolf – on the Margins of Considerations about the Northern Crusade from 1147”. In Vade Nobiscum, Tom XX 2019: Studia Z Historii Politycznej I Wojskowej, edited by Piotr Budzyński, Maciej Dawczyk, Krzysztof Gryglewski, and Michał Ziółkowski, 51–60. Vade Nobiscum. Poland: Lodz University Press, 2019. Accessed January 26, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1483/chapter/4583.