Weis, M.L.C. and Bossemeyer, I.M.K. 1991. Crenicichla gender in the central region of the state of Rio Grande do Sul: Crenicichla vittata heckel, 1840. Ciência e Natura. 13, 13 (Dec. 1991), 123–132. DOI:https://doi.org/10.5902/2179460X26307.