Valadez-González, C., et al. “Feeding Habits of the Round Stingray Urobatis Halleri (Cooper, 1863) (Chondrichthyes: Urolophidae) from the Continental Shelf of Jalisco and Colima, Mexico”. Ciencias Marinas, vol. 27, no. 1, Mar. 2001, pp. 91-104, doi:10.7773/cm.v27i1.375.