Pongsathornwiwat, A., J. Wannasit, and C. Jeenanunta. “A 2-Tuple Linguistic Decision Model for Multi-Criteria Decision-Making Problem Case Study of Selecting Logistic Service Provider in the Bakery Industry”. Journal of Applied Statistics and Information Technology, vol. 4, no. 2, Dec. 2019, pp. 31-45, https://ph02.tci-thaijo.org/index.php/asit-journal/article/view/223764.