1.
Bol. Asoc. Méd. P. R
;
89(1/3): 39-40, Jan.-Mar. 1997.
Article
in Spanish
| LILACS
| ID: lil-411472
2.
Rev. Soc. Boliv. Pediatr
;
35(2): 71-8, 1996.
Article
in Spanish
| LILACS
| ID: lil-196472