Marine Mammal Institute

Weller DW, Carretta JV, Chivers SJ, Ford JKB, Kownacki AK, Lang AR, Martínez-Aguilar S, Rone BK, Schulman-Janiger A. Collaborative Large Whale Survey 2015: Gray Whale Photo-identification Catalog. 2017 .

Dalebout ML, C. Baker S, Steel DJ, Robertson KM, Chivers SJ, Perrin WF, Mead JG, Grace RV, Schofield TD. A divergent mtDNA lineage among Mesoplodon beaked whales: Molecular evidence for a new species in the tropical pacific?. Marine Mammal Science. 2007 ;23:954-966.

Dalebout ML, C. Baker S, Steel DJ, Thompson K, Robertson KM, Chivers SJ, Perrin WF, Goonatilake M, Anderson RC, Mead JG, et al. A Newly Recognised Beaked Whale (Ziphiidae) in the Tropical Indo-Pacific: Mesoplodon hotaula or M. ginkgodens hotaula. Panama City: International Whaling Commission; 2012. http://iwcoffice.org/sc64docs