1.
Mem. Inst. Oswaldo Cruz
;
82(supl.1): 311-323, Nov. 1987. tab, graf
Article
in English
| LILACS
| ID: lil-623790
2.
Rev. chil. pediatr
;
52(5): 441-8, 1981.
Article
in Spanish
| LILACS
| ID: lil-2823