David Kenfack, Roy E. Gereau, Duncan W. Thomas et Moses N. Sainge, «The Tropical African Genus Crotonogynopsis (Euphorbiaceae), with Two New Species», Novon: A Journal for Botanical Nomenclature, vol.24, no3, , p.246–255 (ISSN1055-3177, DOI10.3417/2015005, lire en ligne, consulté le )
(en) David Kenfack, Roy Gereau, Duncan W. Thomas, Moses Nsanyi Sainge, « The Tropical African Genus Crotonogynopsis (Euphorbiaceae), with Two New Species », in Novon, vol. 24, no3, 2015, p.250-253