Albrectsen, Esben. “Rex Insularum. The King of Norway and His ’Skattlands’ As a Political System C. 1260 - C. 1450. Ed.: Steinar Imsen. Fagbokforlaget, Bergen, 2014”. Historisk Tidsskrift, bd. 116, nr. 2, marts 2017, https://tidsskrift.dk/historisktidsskrift/article/view/56859.