1. American Psychiatric Association, 1994. The Diagnostic and Statistical Manual of Mental Disorders, 4th ed. American Psychiatric Association, Washington, DC.
2. Askew, H.R., 1996. Treatment of Behavior Problems in Dogs and Cats: A Guide for the Small Animal Veterinarian. Blackwell Scientific Publications, Oxford.
3. A non-comparative open-label study evaluating the effect of selegiline hydrochloride in a clinical setting;Campbell;Vet. Ther.,2001
4. Diagnosis and classification of psychopathology: challenges to the current system and future directions;Clark;Ann. Rev. Psychol.,1995
5. Cooper, J.J., Mills, D.S., 1997. Welfare considerations relevant to behaviour modifications in domestic animals. In: Mills, D.S., Heath, S.E., Harrington, L.J. (Eds.), Proceedings of the First International Meeting on Veterinary Behavioural Medicine. UFAW, Potters Bar, pp. 164–173.