1. Encyclopedia of Marine Mammals;AA Hohn,2008
2. Scheffer VB, Myrick ACJ. A review of studies to 1970 of growth layers in the teeth of marine mammals. In: Perrin WF, Myrick ACJ, editors. Growth of Odontocetes and Sirenians: Problems in Age Determination: Proceedings of the International Conference on Determining Age of Odontocete Cetaceans [and Sirenians], La Jolla, California, September 5–19, 1978. International Whaling Commission; 1980. pp. 51–64.
3. Recording structures of mammals: determination of age and reconstruction of life history;GA Klevezal,1996
4. Age determination in belugas (Delphinapterus leucas): A quest for validation of dentinal layering;CH Lockyer;Aquat Mamm,2007
5. Hohn AA, Lockyer CH, Acquarone M. Report of the Workshop on Age Estimation in Monodontids. NAMMCO Scientific Publications No 10. NAMMCO; 2016. p. 68.