Saini, Monika, Drishty Goyal, and Ashish Kumar. “Availability and Performance Analysis of Primary Treatment Unit of Sewage Plant”. Thailand Statistician 21, no. 2 (March 29, 2023): 383–396. accessed December 11, 2025. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/249008.