1. Guidelines for animal assisted activity, animal-assisted therapy and resident animal programs,2008
2. The therapeutic roles of cat mascots with a hospital-based geriatric population: a staff survey;Brickel;Gerontologist.,1979
3. Animal assisted intervention research: issues and answers;Johnson;West J Nurs Res.,2002
4. Can pets function as family members?;Cohen;West J Nurs Res,2002
5. Pets and mental health;Cusack,1988