article 1986 A possible mechanism of action of danazol and an ethinylestradiol/ norgestrel combination used as postcoital contraceptive agents ·doi:10.1016/0010-7824(86)90042-9
article 1986 The biochemistry of human endometrium after two regimens of postcoital contraception: a dl-norgestrel/ethinylestradiol combination or danazol ·doi:10.1016/s0015-0282(16)49279-4