Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S
and S-PLUS, Springer, New York. (Appendix A.18)
Pierson, R. A. and Ginther, O. J. (1987), Follicular population
dynamics during the estrus cycle of the mare, Animal
Reproduction Science, 14, 219-231.
Details
Pierson and Ginther (1987) report on a study of the number of large
ovarian follicles detected in different mares at several times in
their estrus cycles.