PAIVA, S. DE; ZAWADZKI, C. H.; RUVULO-TAKASUSUKI, M. C. C.; LAPENTA, A. S.; RENESTO, E. <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, v. 35, n. 4, p. 571-578, 4 jul. 2013.