1. Zeugung beim Menschen im Lichte der Spermatozoenlehre;Belonoschkin,1949
2. Sterility diagnosis: The study of sperm cell migration in the female secretions and interpretation of findings;Cary;New York State J. Med.,1940
3. Atlas of Human Sex Anatomy;Dickinson,1949
4. Human Fertility;Farris,1950
5. How do sperms get into the uterus?;Hartman;Fertil. & Steril.,1957