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???? ???? (? ????????? : Viggo Brun ) ?? ????? ??????? ?????? . ^[6] ??? ??????? ?? ?????? ???????? ??????????? ? ????? ????? ? ??? ???? ?????? ?????? ??????. ^[7]

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^ ^? ^? ????? ???????? ?????? ????????? ? QID : Q547473
^ Store norske leksikon | Viggo Brun (?????????? ???????? ?????????? ????????), ISSN : 2464-1480 , QID : Q746368
^ ^? ^? ????? ???????? ?????? ????????? ? QID : Q547473
^ . ?. 113 https://www.ntnu.no/ojs/index.php/DKNVS_skrifter/article/view/1454 . {{ ??????? ??? }}: |url= ????? ?????? ( ?????? ) ? ?????? |title= ??? ????? ?? ???? (?? ???? ??????) ( ?????? )
^ . ?. 4 https://www.sciencedirect.com/science/article/pii/0315086080900592 . {{ ??????? ??? }}: |url= ????? ?????? ( ?????? ) ? ?????? |title= ??? ????? ?? ???? (?? ???? ??????) ( ?????? )
^ "Viggo Brun" . www.numbertheory.org . ????? ?? ????? ?? 2017-01-16 . ???? ???? ?????? 2017-11-14 .
^ "Viggo Brun" . Store norske leksikon (??????????). 19 Jan 2017. Archived from the original on 2019-05-19.

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