found: Wallin, Erik. Twilight of the gods, 2005:p. 5 (Erik (Jerka) Wallin; from Stockholm)
found: Volunteers of the Waffen-SS WWW site, Nov. 15, 2005(Wallin, Erik Stig; b. 2 Aug. 1921, Stockholm; SS-Unterschaftführer, served in the Swedish Volunteer Corps)
found: Deutsche Nationalbibliothek authority file, February 8, 2017:access point (Wallin, Erik, 1921-1997; pseudonym, Jerk, Wiking)
found: Wallin, Erik. Götterdämmerung 1945, 2004:title page (Wiking Jerk)
found: Swedish Wikipedia, February 9, 2017:(Erik Wallin, SS-Oberscharführer; b. August 2, 1921, Stockholm, d. September 24, 1997, Stockholm)