Galíndez, E.J. & Díaz-Andrade, M.C. & Avaca, M.S. & Estecondo, S. (2010)
Morphological study of the oviductal gland in the smallnose fanskate Sympterygia bonapartii (Müller and Henle, 1841) (Chondrichthyes, Rajidae). Revista Brasileira de Biologia, 70(2): 325–333