1.
Rev. Fac. Cienc. Méd. Univ. Cuenca
;
21(3): 7-14, jun. 1996.
Article
in Spanish
| LILACS
| ID: lil-188620
2.
Rev. Fac. Cienc. Méd. Univ. Cuenca
;
17(1): 98-106, 1988.
Article
in Spanish
| LILACS
| ID: lil-72879