W. Cooper
发表
R. Kenney,
R. Bergman,
W. Cooper,
1975
.
H. Erb,
B. Ball,
J. Baldwin,
1987,
Journal of reproduction and fertility. Supplement.
K. Hinrichs,
R. Kenney,
W. Cooper,
1988,
Theriogenology.
H. Erb,
J. Baldwin,
D. Vanderwall,
1991,
Journal of the American Veterinary Medical Association.
M. Murray,
J. Holste,
J. L. Cox,
2010,
Equine veterinary journal. Supplement.