Chutiphongdech, Thanavutd, and Rugphong Vongsaroj. “Airport Technical Efficiency Assessment by Using Data Envelopment Analysis Models”. Creative Business and Sustainability Journal 42, no. 2 (June 2, 2020): 73–99. Accessed May 6, 2024. https://so01.tci-thaijo.org/index.php/CBSReview/article/view/242103.