Allozyme analysis of the four species of Hypostomus (Teleostei: Loricariidae) from the Ivaí river, upper Paraná river basin, Brazil - doi: 10.4025/actascibiolsci.v35i4.16355. Acta Sci. Biol. Sci. 2013;35(4):571-578. doi:10.4025/actascibiolsci.v35i4.16355