Sverre Bagge: From Viking Stronghold to Christian Kingdom. State Formation in Norway c. 900-1350. Museum Tusculanum Press, University of Copenhagen, 2010.

Hybel, N. (2013). 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(2). Hentet fra https://tidsskrift.dk/historisktidsskrift/article/view/56531