Laopracha, Natthariya, Rapeeporn Chamchong, and Phattanapong Chompoowises. “A flexible and low cost checking system for multiple choice examinations”. Engineering and Applied Science Research 40, no. 2 (June 24, 2014): 221–227. accessed September 23, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/19102.