Sapolsky, Robert M. 1998. Why Zebras Don’t Get Ulcers: An Updated Guide to Stress, Stress-Related Diseases, and Coping, rev. ed. New York: W. H. Freeman.
Sheline, Yvette I., Po W. Wang, Mokhtar H. Gado, John G. Csernansky, and Michael W. Vannier. 1996. Hippocampal atrophy in recurrent major depression // Proceedings of the National Academy of Sciences 93: 3908–13.