• [Wiki] http://en.wikipedia.org/wiki/Eschrichtius_robustus.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Eschrichtius_robustus.
• [ADW] http://animaldiversity.org/accounts/Eschrichtius_robustus/.
• [learner] https://www.learner.org/jnorth/tm/gwhale/AdaptationsBody.html.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [Sumi1986] Sumich, J. L. (1986). Growth in young gray whales (Eschrichtius robustus). Marine Mammal Sci, 2:145--152.