1. Methodology for the optimized sperm penetration assay;Johnson,1990
2. The cycle of the seminiferous epithelium in man;Clermont;Am J Anat,1963
3. Adult spermatogenesis: characteristics, kinetics, and control;Huckins,1983
4. The epididymis, sperm maturation, and capacitation;Howards,1983
5. Pregnancy caused by sperm from vasa efferentia;Silber;Fertil Steril,1988