Hybel, Nils. “Sverre Bagge: From Viking Stronghold to Christian Kingdom. State Formation in Norway C. 900-1350. Museum Tusculanum Press, University of Copenhagen, 2010”. Historisk Tidsskrift 111, no. 2 (marts 6, 2013). Set december 5, 2025. https://tidsskrift.dk/historisktidsskrift/article/view/56531.