Guppy love under the microscope Artikel over onderzoek aan partnerkeuze bij guppy's in verband met soortvorming. (BBC, Engels))
Poeser, F.N., M. Kempkes & I.J.H. Isbrücker (2005). Description of Poecilia (Acanthophacelus) wingei n. sp. from the Paría Peninsula, Venezuela, including notes on Acanthophacelus Eigenmann, 1907 and other subgenera of Poecilia Bloch and Schneider, 1801 (Teleostei, Cyprinodontiformes, Poeciliidae). Contributions to Zoology74(1/2): 97-115; pdf