Pongpalanchai, N. and Ratanakuakangwan, S. (2015) “Improving the purchasing process for spare parts in a Petrochemical Plant”, Thai Industrial Engineering Network Journal, 1(2), pp. 16–22. available at: https://ph02.tci-thaijo.org/index.php/ienj/article/view/180362 (accessed: 13 September 2026).