Nwaogazie, Ify L., Oghenefejiri Bovwe, and Levi O. Uba. 2020. “Concept Selection in Wastewater Treatment Plant Design Using Analytical Hierarchy Process”. Emerging Issues in Science and Technology Vol. 2, January, 107-16. https://stm1.bookpi.org/index.php/eist-v2/article/view/840.