Paul the Deacon, Historia Langobardorum, ii.32 (on-line textLưu trữ 2008-01-13 tại Wayback Machine); Henry Wace, A Dictionary of Christian Biography, Literature, Sects and Doctrines, vol. II (1880) s.v. "Euin".
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Paul the Deacon, Historia Langobardorum, ii.32 (on-line textLưu trữ 2008-01-13 tại Wayback Machine); Henry Wace, A Dictionary of Christian Biography, Literature, Sects and Doctrines, vol. II (1880) s.v. "Euin".