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2. Activite' de la delta 5-3 beta hydroxy steroide dehydrogenase dans le placenta human á terme aprés culture: Influence de l'hormone gonadotrope chorionique;Guichard;C.R. Acad. Sci. (D) Paris,1975
3. In vitro biosynthesis of steroids in placental tissues;Venning,1964
4. Factors influencing placental Steroidogenesis in vitro;Macome;Steroids,1972
5. Isolation and functional maintenance in culture of human syncytiotrophoblasts;Paul;Ind. J. exp. Biol.,1978