^Mardal, Magnus A. "Karl Johan". In Bolstad, Erik (ed.). Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 18 December 2023.
^Scott, Jess (22 May 2020). "The Story of Spå-Eilev: Once Upon a Time in 19th-Century Telemark". Life in Norway. Retrieved 21 September 2022.
^"Theodor Nilsen Stousland" (in Norwegian). Norwegian Social Science Data Services (NSD). Retrieved 7 November 2012.
^Gram, Trond. "Karl Gether Bomhoff". In Bolstad, Erik (ed.). Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 20 November 2020.
^Aubert, Karl Egil; Delphin, Inger Lise A. "Sophus Lie". In Bolstad, Erik (ed.). Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 20 November 2020.