kamao, katayut, and Monwipa Arviphan. 2022. “Pickup and Delivery Vehicle Routing Problem in Bike Sharing System: A Case Study of the Chiang Mai Bike-Sharing System, Thailand”. Engineering and Technology Horizons 39 (1):91-105. https://ph01.tci-thaijo.org/index.php/lej/article/view/245963.