O. E. Okwun

Number and function of Sertoli cells, number and yield of spermatogonia, and daily sperm production in three breeds of boar.

L. Johnson, D. Lunstra, J. Ford, 1996, Journal of reproduction and fertility.

Testicular composition, number of A spermatogonia, germ cell ratios, and number of spermatids in three different breeds of boars.

L. Johnson, D. Lunstra, J. Ford, 1996, Journal of andrology.