Josué Garza Flores

Comparative study on the efficacy and acceptability of two contraceptive pills administered by the vaginal route: An international multicenter clinical trial

E. Coutinho, S. Segal, V. Brache, 1993, Clinical pharmacology and therapeutics.

A 13-month multicenter clinical experience of a low-dose monophasic oral contraceptive containing 20 microg ethinylestradiol and 75 microg gestodene in Latin American women.

R. Tozzini, O. C. Ortiz, S. Bassol, 2003, Contraception.