Wattanakul, T., & Nonthapot, S. (2017). Analysis of market structure and passenger transportation demand model between Thailand and Laos: case study of the customs house, Friendship Bridge, Nong Khai province. Asia-Pacific Journal of Science and Technology, 16(3), 292–305. Retrieved from https://so01.tci-thaijo.org/index.php/APST/article/view/83220