Dávila-Ortiz, J. (2002)
Biologiá reproductiva de la raya mariposa Gymnura marmorata (Cooper 1863), en Bahía Almejas, B.C.S., México.
Thesis de Licenciatura. 38 p.
Dávila-Ortíz, J. & Villavicencio-Garayzar, C.J. (2000)
Gymnura marmorata (Cooper, 1863) and Gymnura crebripunctata (Peters, 1869), two species or sexual dimorphism? Abstract.
American Elasmobranch Society 16th Annual Meeting, 14–20 June 2000, La Paz, Mexico