Chivers, S. J.; Leduc, R. G.; Robertson, K. M.; Barros, N. B.; Dizon, A. E. (2006). "Genetic Variation of Kogia spp. with Preliminary Evidence for Two Species of Kogia sima". Marine Mammal Science. 21 (4): 619–634. CiteSeerX10.1.1.222.2209. doi:10.1111/j.1748-7692.2005.tb01255.x.
Bossart, G. D.; Odell, D. K.; Altman, N. H. (1985). "Cardiomyopathy in Stranded Pygmy and Dwarf Sperm Whales". Journal of the American Veterinary Medical Association. 187 (11): 1137–1140. PMID4077624.
Chivers, S. J.; Leduc, R. G.; Robertson, K. M.; Barros, N. B.; Dizon, A. E. (2006). "Genetic Variation of Kogia spp. with Preliminary Evidence for Two Species of Kogia sima". Marine Mammal Science. 21 (4): 619–634. CiteSeerX10.1.1.222.2209. doi:10.1111/j.1748-7692.2005.tb01255.x.