มั่นคง ส. and หิรัญวโรดม ส. (2014) “The Study of Back Sheet Material Properties Using Damp Heat Testing Method”, Frontiers in Engineering Innovation Research, 1, pp. 63–74. available at: https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242077 (accessed: 2 September 2026).