Paiva, S. de, Zawadzki, C.H., Ruvulo-Takasusuki, M.C.C., Lapenta, A.S. and Renesto, E. 2013. <b>Allozyme analysis of the four species of <i>Hypostomus</i> (Teleostei: Loricariidae) from the Ivaí river, upper Paraná river basin, Brazil</b&gt; - doi: 10.4025/actascibiolsci.v35i4.16355. Acta Scientiarum. Biological Sciences. 35, 4 (Jul. 2013), 571-578. DOI:https://doi.org/10.4025/actascibiolsci.v35i4.16355.