Olesen, Jens E.. "The Swedish Expeditions (‘Crusades’) Towards Finland Reconsidered". Church and Belief in the Middle Ages: Popes, Saints, and Crusaders, edited by Kirsi Salonen and Sari Katajala-Peltomaa, Amsterdam: Amsterdam University Press, 2016, pp. 251-268. https://doi.org/10.1515/9789048525720-012