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, [S. l.], v. 111, n. 2, p. 572–577, 2013. DOI: 10.7146/ht.v111i2.56531. Disponível em: https://tidsskrift.dk/historisktidsskrift/article/view/56531. Acesso em: 20 mar. 2026.