Erik Fossen; Håvard Bjelland (31 December 2011). "Man må tro at det nytter" [One must believe that it is possible]. Bt.no (به نروژی). Archived from the original on 27 September 2013. Retrieved 17 January 2013.
Erik Fossen; Håvard Bjelland (31 December 2011). "Man må tro at det nytter" [One must believe that it is possible]. Bt.no (به نروژی). Archived from the original on 27 September 2013. Retrieved 17 January 2013.