Albrectsen, E. 2017. 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. 116, 2 (mar. 2017), 538–544. DOI:https://doi.org/10.7146/ht.v116i2.56859.