Keawsriyong, T., Wipulanusart, W., Leelatanon, S., Suksuwan, N., Weekaew, J., Bao Pham, Q. and Ditthakit, P. (2025) “Optimizing Gravity-Fed Sewer Systems using GRG and PGSL: A Path to Cost-Effective Design”, Engineering, Technology & Applied Science Research. Greece, 15(3), pp. 24087–24092. doi: 10.48084/etasr.10228.