Tuntitippawan, Naritsak, and Krisada Asawarungsaengkul. 2016. “An Artificial Bee Colony Algorithm With Local Search for Vehicle Routing Problem With Backhauls and Time Windows”. Engineering and Applied Science Research 43 (November):404-8. https://ph01.tci-thaijo.org/index.php/easr/article/view/70814.