On the reproduction of brazilian fishes . Xviii. The occurrence of male germinative cells in the ovary of catfish rhamdia quelen quoy & gaimard 1824 - Santos, H S L; Nuti-Sobrinho, A; Lopes, R A; Paula-Lopes, O V; Bahls, Alvacir dos Santos; Soares, T R S; Watanabe, Ii-Sei (Revista Regional de Ciencias, 1993)