J. Flores-Ortega, E. Godínez-Domínguez, G. González-Sansón, J. Rojo-Vázquez, A. Corgos, and M. Morales-Jáuregui, “Feeding habits of three round stingrays (Rajiformes: Urotrygonidae) in the central Mexican Pacific”, Cienc. Mar., vol. 37, no. 3, pp. 279–292, Mar. 2011.