共 16 条
[3]
BURTON SC, 1981, AM J VET RES, V42, P308
[5]
Fraser D., 1975, Applied Animal Ethology, V2, P19, DOI 10.1016/0304-3762(75)90062-0
[6]
Glendinning S. A., 1974, Equine Veterinary Journal, V6, P12, DOI 10.1111/j.2042-3306.1974.tb03920.x
[9]
HOUPT KA, 1982, J ANIM SCI
[10]
Liddell HS, 1954, SCI AM, V190, P48