1.
PCM
;
2(2): 48-53, 1988.
Article
in Spanish
| LILACS
| ID: lil-97718
2.
PCM
;
2(1): 29-34, 1988. tab
Article
in Spanish
| LILACS
| ID: lil-66814
3.
Rev. Fund. José Maria Vargas
;
10(2): 60-4, jun. 1986.
Article
in Spanish
| LILACS
| ID: lil-38077