1. Caras R. (n.d.). Quotations by author: Roger Caras. Retrieved November 11 2005 from The Quotations Page Web site: http://www.quotationspage. com/quotes/Roger_Caras/
2. Animalassisted therapy: An in-depth look;Connor K.;Dimensions of Critical Care Nursing,2000
3. Animal companions and one-year survival of patients after discharge from a coronary care unit;Friedmann E.;Public Health Reports,1980
4. Therapeutic use of companion animals in health care;Jorgenson J.;Image,1997
5. Stressful life events and use of physician services among the elderly: The moderating role of pet ownership;Siegel J.M.;Journal of Personality and Social Psychology,1990