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Nagy, John D.; Victor, Erin M.; Cropper, Jenese H. (2007). «Why don't all whales have cancer? A novel hypothesis resolving Peto's paradox». Integrative and Comparative Biology. 47 (2): 317–328. PMID21672841. doi:10.1093/icb/icm062
Fleming, J.M.; Creevy, K.E. (25 de fevereiro de 2011). «Mortality in North American Dogs from 1984 to 2004: An Investigation into Age-, Size-, and Breed-Related Causes of Death». Journal of Veterinary Internal Medicine. 25 (2): 187–198. PMID21352376. doi:10.1111/j.1939-1676.2011.0695.x
Schiffman, Joshua (8 de outubro de 2015), «Potential Mechanisms for Cancer Resistance in Elephants and Comparative Cellular Response to DNA Damage in Humans», JAMA, 314 (17): 1850–60, PMC4858328, PMID26447779, doi:10.1001/jama.2015.13134