Sodsoon, S., Kornvirat, S. and Sodsoon, N. (2015) “Simulated annealing (SA) to vehicle routing problems with soft time windows”, Engineering and Applied Science Research, 41(4), pp. 449–461. available at: https://ph01.tci-thaijo.org/index.php/easr/article/view/28298 (accessed: 28 September 2026).