American Veterinary Society of Animal Behavior. (2007). Guidelines on the Use of Punishment for Dealing with Behavior Problems in Animals [Electronic Version]. AVSAB. Retrieved November 24, 2007 from http://www.avsabonline.org/avsabonline/images/stories/punishment%20guidelines-aversives%20effects-definitions.pdf.
Dityatev, A. E., & Bolshakov, V. Y. (2005). Amygdala, long-term potentiation, and fear conditioning. Neuroscientist, 11(1), 75-88.
Friman, P. C. (1998). Why behavior analysts should study amotion: The example of anxiety. Journal of Applied Behavior Analysis, 3(1), 137-156.
