Bossemeyer, I.M.K. and Hall, G.A.B. 1980. Determination of the time of spawing and maturation of the jundiá, rhamdia sapo, based on the gonado-somatic index (GSI) and the morphocytologic study of the gonods. Ciência e Natura. 2, 2 (Dec. 1980), 133–151. DOI:https://doi.org/10.5902/2179460X24869.