Escobar-Sánchez, O. & Galván-Magaña, F. & Downton-Hoffmann, C.A. & Carrera-Fernández, M. & Alatorre-Ramírez, V.G. (2009)
First record of a morphological abnormality in the longtail stingray Dasyatis longa (Myliobatiformes: Dasyatidae) in the Gulf of California, Mexico. Marine Biodiversity Records, 2, Article e26
DOI: 10.1017/S1755267208000304

Escobar-Sánchez, O. & Galván-Magaña, F. & Downton-Hoffmann, C.A. & Carrera-Fernández, M. & Alatorre-Ramírez, V.G. (2008)
First record of a morphological abnormality in the longtail stingray Dasyatis longa (Myliobatiformes: Dasyatidae) in the Gulf of California, Mexico. JMBA2 – Biodiversity Records

Downton-Hoffmann, C.A. & Villavicencio-Garayzar, C.J. & Uraga, F.R. (2000)
Age and growth of the shovelnose guitarfish, Rhinobatos productus, in the western coast of Baja California Sur, México [Abstract]. American Elasmobranch Society 16th Annual Meeting, 14–20 June 2000, La Paz, Mexico

Downton-Hoffmann, C.A. & Villavicencio-Garayzar, C.J. (2000)
"El Niño"/Southern Oscillation effects on the shovelnose guitarfish, Rhinobatos productus, and Pacific electric ray, Narcine entemedor, in Bahía Almejas, B.C.S., México [Abstract]. American Elasmobranch Society 16th Annual Meeting, 14–20 June 2000, La Paz, Mexico

Villavicencio-Garayzar, C.J. & Estrada-Agüero, G. & Downton-Hoffmann, C.A. (1997)
Primer registro de Alopias pelagicus en el Golfo de California, México. Revista de Biología Tropical, 44(3)/45(1): 688–689

Downton-Hoffmann, C.A. & Villavicencio-Garayzar, C.J. (1994)
Reproductive biology of the shovelnose guitarfish, Rhinobatos productus, in Bahia Almejas, B.C.S., Mexico [Abstract]. American Elasmobranch Society 10th Annual Meeting, 2.–8. June 1994, University of Southern California, Los Angeles