P. Wagner and P.-A. Crochet, “The status of the nomina Trapelus savignyi Audouin, 1827 and Agama savignii Duméril & Bibron, 1837 and the valid nomen of the Savigny’s Agama (Sauria: Agamidae)”, Zootaxa, vol. 2209, no. 1, pp. 57–64, Aug. 2009.