Periphytic algal community in artificial and natural substratum in a tributary of the Rosana reservoir (Corvo Stream, Paraná State, Brazil) - doi: 10.4025/actascibiolsci.v32i4.4627. Acta Sci. Biol. Sci. 2010;32(4):373-385. doi:10.4025/actascibiolsci.v32i4.4627