José Luis, C. A., H. Espinosa Pérez, and L. Huidobro Campos. “Two New Species of the Genus Squatina (Chondrichthyes: Squatinidae) from the Gulf of Mexico”. Revista De Biología Tropical, vol. 54, no. 3, Sept. 2006, pp. 1031–1040, doi:10.15517/rbt.v54i3.13968.