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WikiPedia: Sigurd Snake-in-the-Eye http://www.germanicmythology.com/FORNALDARSAGAS/Ra... http://www.germanicmythology.com/FORNALDARSAGAS/Th... http://danmarkshistorien.dk/leksikon-og-kilder/vis... http://img.kb.dk/tidsskriftdk/pdf/ho/ho_1994-PDF/h... http://www.snerpa.is/net/forn/rag-son.htm //doi.org/10.1179%2F0078172X14Z.00000000075 http://www.northvegr.org/sagas%20annd%20epics/lege... http://www.historyfiles.co.uk/FeaturesBritain/Engl... https://www.history.com/shows/vikings/cast/sigurd-... https://www.academia.edu/10247408/%C3%86lla_and_th...