Paiva, M. P., & Nepomuceno, F. H. (1989). On the reproduction in captivity of the
oscar, Astronotus ocellatus (CUVIER), according to the mating methods (Pisces - Cichlidae). Amazoniana:
Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas, 10(4), 361-377.