Effects of two oral contraceptives, containing 30 or 20 'mü' of ethinyl estradiol in combination with gestodene, on blood coagulation and fibrinolysis in brazilian women - Ferreira, Ana Carla Pereira; Montes, Marlise Boneti Agostinho; Franceschini, Silvio Antonio; Toloi, Maria Regina Torqueti (International Journal of Fertility, 2001)