Laopracha, N., Chamchong, R. and Chompoowises, P. (2014) “A flexible and low cost checking system for multiple choice examinations”, Engineering and Applied Science Research, 40(2), pp. 221–227. available at: https://ph01.tci-thaijo.org/index.php/easr/article/view/19102 (accessed: 24 September 2026).