↑ I. P. Shaskol'skii "Финляндский источник по географии Северной России и Финляндии середины XVI века." История географических знаний и открытий на Севере Европы (1973). pp.151-152
Shkvarov, Alexei (2012). Россия и Швеция. История военных конфликтов 1142-1809[Russia and Sweden. The history of military conflicts 1142-1809] (in Russian). Saint-Petersburg: RME Group Oy:Алетейя. ISBN978-5-91419-754-1.{{cite book}}: CS1 maint: publisher location (link)
Harrison, Dick (2002). "Härskare i Finland" [Ruler in Finland]. Karl Knutsson: en biografi[Karl Knutsson: a biography] (in Swedish). Historiska Media. ISBN9789189442580.
Nordberg, Michael[in Swedish] (1996). I kung Magnus tid: Norden under Magnus Eriksson: 1317-1374[In the time of King Magnus: The North under Magnus Eriksson: 1317-1374] (in Swedish). Stockholm: Norstedt. ISBN9119521227.
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