Raschi, W. (1986)
A morphological analysis of the ampullae of Lorenzini in selected skates (Pisces, Rajoidei). Journal of Morphology, 189(3), 225–247
DOI: 10.1002/jmor.1051890303

Mould, B. (1997)
Classification of the recent Elasmobranchii. Copyright Brian Mould 1997