Poomrittigul, Suvit, Panwit Tuwanut, and Lunchakorn Wuttisittikulkij. 2023. “Study and Evaluation of Impact of Operation Modification for Bangkok Rapid Transit Train Ticket System Using Queuing Theory Model”. Journal of Advanced Development in Engineering and Science 8 (21). Babgkok, Thailand:75-85. https://ph03.tci-thaijo.org/index.php/pitjournal/article/view/889.