(en) Kate Ezra, Royal Art of Benin: The Perls Collection in the Metropolitan Museum of Art, Metropolitan Museum of Art, (ISBN978-0-87099-633-7, lire en ligne)
(en) Jacob U. Egharevba, Concise Lives of the Famous Iyases of Benin, Kraus Reprint, (lire en ligne)
Blackmun, « Continuity and Change: The Ivories of Ovonramwen and Eweka II », African Arts, vol. 30, no 3, , p. 68–79 (DOI10.2307/3337502, JSTOR3337502)
Osarhieme Benson Osadolor, « The Benin Royalist Movement and Its Political Opponents: Controversy over Restoration of the Monarchy, 1897—1914 », The International Journal of African Historical Studies, vol. 44, no 1, , p. 45–59 (ISSN0361-7882, lire en ligne, consulté le )
John Ogene, « The Politics of Patronage and the Igun Artworker in Benin City », African Arts, vol. 45, no 1, , p. 42–49 (ISSN0001-9933, lire en ligne, consulté le )
Blackmun, « Continuity and Change: The Ivories of Ovonramwen and Eweka II », African Arts, vol. 30, no 3, , p. 68–79 (DOI10.2307/3337502, JSTOR3337502)
Osarhieme Benson Osadolor, « The Benin Royalist Movement and Its Political Opponents: Controversy over Restoration of the Monarchy, 1897—1914 », The International Journal of African Historical Studies, vol. 44, no 1, , p. 45–59 (ISSN0361-7882, lire en ligne, consulté le )
John Ogene, « The Politics of Patronage and the Igun Artworker in Benin City », African Arts, vol. 45, no 1, , p. 42–49 (ISSN0001-9933, lire en ligne, consulté le )