↑ Langslet, Lars Roar; Mardal, Magnus A. "Karl 2.". In Bolstad, Erik (ed.). Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 18 December 2023.
↑ Mardal, Magnus A. "Karl Johan". In Bolstad, Erik (ed.). Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 18 December 2023.
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