Lateh A, Suthammanon S, Sirivongpisal N, Tehyo M. Solving a Vehicle Routing Problem with Time Window for Transportation Service Planning for Elderly People: A Case Study of Hatyai District Songkhla Province. Pnu Sci J [Internet]. 2019 Apr. 2 [cited 2024 Apr. 19];11(2):117-31. Available from: https://li01.tci-thaijo.org/index.php/pnujr/article/view/132835