Schwartz, Stefanie (June 2003). "Separation anxiety syndrome in dogs and cats". Journal of the American Veterinary Medical Association. 222 (11): 1526-32. doi:10.2460/javma.2003.222.1526. PMID12784957.
Bradshaw, John (2016). "Sociality in cats: A comparative review". Journal of Veterinary Behavior: Clinical Applications and Research. 11: 113-124. doi:10.1016/j.jveb.2015.09.004.
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Schwartz, Stefanie (June 2003). "Separation anxiety syndrome in dogs and cats". Journal of the American Veterinary Medical Association. 222 (11): 1526-32. doi:10.2460/javma.2003.222.1526. PMID12784957.