Impact assessment of treated wastewater on water quality of the receiver using the Wilcoxon testPiotr Ofman, Monika Puchlik, Grzegorz Simson, Małgorzata Krasowska and Joanna Struk-SokołowskaE3S Web Conf., 22 (2017) 00127DOI: https://doi.org/10.1051/e3sconf/20172200127