1. Physiology of spermatozoal insemination in the female reproductive tract;Hafez,1980
2. What constitutes normal semen?;Falk;Fertil Steril,1950
3. Interrelationship among the characteristics of human semen and factors affecting semen specimen quality;Freund;J Reprod Fertil,1962
4. Factors affecting sperm motility. I. In vitro change in motility with time after ejaculation;Makler;Fertil Steril,1979
5. The effect of temperature on sperm motility. II. Is bacterial growth a factor?;Appel;Fertil Steril,1978