“Vegetal Test-System Investigation on Cytotoxicity of Water from Urban Streams Located in the Northeastern Region of Maringá, Paraná State, Brazil - Doi: 10.4025 actascibiolsci.V33i1.4924”. Acta Scientiarum. Biological Sciences, vol. 33, nº 1, fevereiro de 2011, p. 71-77, https://doi.org/10.4025/actascibiolsci.v33i1.4924.