Damasceno, I. F., Leal, V. L., Coelho, R. C., de Moura, C. V. R. and de Moura, E. M. (2014) “Evaluation of pollution level caused by domestic effluent in the Poty river – Teresina PI - Brazil”, Eclética Química, 37(1), pp. 51–60. doi: 10.26850/1678-4618eqj.v37.1.2012.p51-60.