Reidenberg, Joy S. (2007). "Anatomical adaptations of aquatic mammals". The Anatomical Record290 (6): 507–513. doi:10.1002/ar.20541. பப்மெட்:17516440.
nih.gov
ncbi.nlm.nih.gov
Reidenberg, Joy S. (2007). "Anatomical adaptations of aquatic mammals". The Anatomical Record290 (6): 507–513. doi:10.1002/ar.20541. பப்மெட்:17516440.
ucsd.edu
cetus.ucsd.edu
Ralls, Katherine; Mesnick, Sarah (2009-02-26). "Sexual Dimorphism". Encyclopedia of Marine Mammals (2nd ed.). San Diego: Academic Press. pp. 1005–1011. ISBN978-0-08-091993-5. Archived from the original(PDF) on 2019-07-25. Retrieved 2019-02-25.
web.archive.org
Ralls, Katherine; Mesnick, Sarah (2009-02-26). "Sexual Dimorphism". Encyclopedia of Marine Mammals (2nd ed.). San Diego: Academic Press. pp. 1005–1011. ISBN978-0-08-091993-5. Archived from the original(PDF) on 2019-07-25. Retrieved 2019-02-25.