Booncherd, T. ., Karnthang, N. ., Buarod, C. ., & Boonperm, A.- aree. (2022). An Integer Goal Programming Model for a Touring Route Planning under the Factors by Tourists. Thai Journal of Operations Research : TJOR, 10(1), 153–165. retrieved from https://ph02.tci-thaijo.org/index.php/TJOR/article/view/246002