1. Clinical classification of canine aggression;Beaver;Appl. Anim. Ethol.,1983
2. Aggressive behavior associated with naturally elevated serum testosterone in mares;Beaver;Appl. Anim. Ethol.,1982
3. Domesticated Animals from Early Times;Clutton-Brock,1981
4. Biochemical, pharmacological, and genetic aspects of aggression;Eichelman,1981
5. Ass, mule, and onager;Epstein,1984