P.Suneel Kumar, Dr. R. Kiranmayi, K.Nagabhushanam, K. Firdose Kowser Ahamadia (2021) “An Equivalent Transfer Function based Pid Controller Design for Waste Water Treatment Plant”, Design Engineering, pp. 14467 - 14477. Available at: http://thedesignengineering.com/index.php/DE/article/view/6574 (Accessed: 1May2024).