1.
Rev. colomb. obstet. ginecol
;
48(4): 237-8, oct.-dic. 1997.
Article
in Spanish
| LILACS
| ID: lil-237651
2.
Ginecol. obstet. Méx
;
63(5): 172, mayo 1995.
Article
in Spanish
| LILACS
| ID: lil-151901