Authors: I Sivin; S el Mahgoub; T McCarthy; D R Mishell; D Shoupe; F Alvarez; V Brache; E Jimenez; J Diaz; A Faundes Journal: Contraception Date: 1990-10 Impact factor: 3.375
Authors: I Sivin; J Stern; E Coutinho; C E Mattos; S el Mahgoub; S Diaz; M Pavez; F Alvarez; V Brache; F Thevenin Journal: Contraception Date: 1991-11 Impact factor: 3.375