Cytotoxic potential of waters of the streams Mandacaru, Maringá, Miosótis and Nazareth in the urban area of Maringá, Paraná State, Brazil - doi: 10.4025/actascibiolsci.v34i3.8275. Acta Sci. Biol. Sci. 2012;34(3):311-318. doi:10.4025/actascibiolsci.v34i3.8275