Busbee, David, Ian Tizard, Jeffrey Sroit, Davide Ferrirc, and Ellen Orr-reeves. “Environmental Pollutants and Marine Mammal Health: The Potential Impact of Hydrocarbons and Halogenated Hydrocarbons on Immune System Dysfunction”. J. Cetacean Res. Manage. (October 15, 2020): 223–248. Accessed November 27, 2021. https://journal.iwc.int/index.php/jcrm/article/view/254.