Salazar-Hermoso, F. & Villavicencio-Garayzar, C.J. (1999)
Relative abundance of the shovelnose guitarfish Rhinobatos productus (Ayres, 1856) (Pisces: Rhinobatidae) in Bahia Almejas, Baja California Sur, from 1991 to 1995.
Ciencias Marinas, 25(3), 401–422