1.
Rev. ecuat. med. cienc. biol
;
23(1): 45-50, ene.-jun. 1987.
Article
in Spanish
| LILACS
| ID: lil-59590
2.
Rev. ecuat. med. cienc. biol
;
22(1): 67-71, ene.-jun. 1986.
Article
in English
| LILACS
| ID: lil-38926