1.
Gac. méd. Méx
;
133(1): 13-24, ene.-feb. 1997.
Article
in Spanish
| LILACS
| ID: lil-227246
2.
Gac. méd. Méx
;
123(7/8): 135-7, jul.-ago. 1987.
Article
in Spanish
| LILACS
| ID: lil-62118