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). Tilgængelig hos: https://tidsskrift.dk/historisktidsskrift/article/view/56531 (Set: 5 december 2025).