1. Senile Changes of Dog Skin;Baker;Journal of Small Animal Practice,1967
2. Cooley , D. M. Waters , D. J. 2001 Cancer in the Elderly Dog Vancouver, BC, Canada
3. Geriatrics and Aging
4. Preface. Geriatrics and Gerontology;Goldston;Veterinary Clinics of North America (Small Animal Practice),1989