Kaewploy, Sujittra, Sombat Sindhuchao, and Somsak Kaewploy. 2021. “The Selection of the Network Marketing Locations and Vehicle Routing for Rubber in the Lower Southern Part of Thailand: doi: 10.14456/mijet.2021.21”. Engineering Access 7 (2). Mahasakham, Thailand:137-44. https://ph02.tci-thaijo.org/index.php/mijet/article/view/243871.