Effluent quality assessment of sewage treatment plant using principal component analysis and cluster analysis. Journal of Engineering, [S. l.], v. 27, n. 4, p. 79–95, 2021. DOI: 10.31026/j.eng.2021.04.07. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/1323.. Acesso em: 4 jul. 2024.