KASSAWAT, S., S. SARAPIROME, and V. RATANAVARAHA. “Integration of Spatial Models for Web-Based Risk Assessment of Road Accident”. Walailak Journal of Science and Technology (WJST), vol. 12, no. 8, Jan. 2015, pp. 671-9, https://wjst.wu.ac.th/index.php/wjst/article/view/1242.