Worawattawechai, T., Intiyot, B., & Jeenanunta, C. (2016). CUCKOO SEARCH ALGORITHM FOR THE VEHICLE ROUTING PROBLEM WITH BACKHAULS AND TIME WINDOWS. วารสารปัญญาภิวัฒน์, 8, 136–149. สืบค้น จาก https://so05.tci-thaijo.org/index.php/pimjournal/article/view/73551