1) Anderson D. J. et al. : Monoclonal anoibodies to human trophoblast and sperm antigens, Report of two WHO-sponsered workshops, June. 30. 1986-Toronto, Canada, J. Reprod. Immunol. 10 : 231, 1987.
2) Austin C. R. : Observations on the penetration of the sperm into the mammarian egg, Aust. J. Sci. Res. Ser B. 4 : 581, 1951.
3) Biggers J. S. et al. : The culture of mouse embryos in vitro, Method in mammalian embryology. (ed. Daniel J. D.) 101, Freeman Co. San Francisco. 1979.
4) Brackett B. G. et al. : Capacitaion of rabbit spermatozoa in vitro, Biol. Reprod., 12 : 260, 1975.
5) Bratlid D. et al. : Bacteriolytic activity of amniotic fluid, Obstet Gynecol., 51 : 63, 1978.