Marine Mammal Institute

Weller, D. W., Carretta, J. V., Chivers, S. J., Ford, J. K. B., Kownacki, A. K., Lang, A. R., et al.. (2017). Collaborative Large Whale Survey 2015: Gray Whale Photo-identification Catalog.

Dalebout, M. L., C. Baker, S., Steel, D. J., Robertson, K. M., Chivers, S. J., Perrin, W. F., et al.. (2007). A divergent mtDNA lineage among Mesoplodon beaked whales: Molecular evidence for a new species in the tropical pacific?. Marine Mammal Science, 23, 954-966.

Dalebout, M. L., C. Baker, S., Steel, D. J., Thompson, K., Robertson, K. M., Chivers, S. J., et al.. (2012). A Newly Recognised Beaked Whale (Ziphiidae) in the Tropical Indo-Pacific: Mesoplodon hotaula or M. ginkgodens hotaula. Panama City: International Whaling Commission. Retrieved from http://iwcoffice.org/sc64docs