Punyakum, Voravee, Krisanarach Nitisiri, Kanchana Sethanan, and Dusit Singpommat. “A self-adaptive differential evolution for the technician routing and scheduling problem”. Engineering and Applied Science Research 50, no. 3 (May 24, 2023): 262–269. accessed August 28, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/251019.