Muangprathub, Jirapond, Oatchima Shichim, Yuthaya Jaroensuk, and Siriwan Kajornkasirat. “Automatic Grading of Scanned Multiple Choice Answer Sheets”.
International Journal of Engineering and Technology 7, no. 2.23 (April 20, 2018): 175–179. Accessed April 9, 2025.
https://sciencepubco.com/index.php/IJET/article/view/11910.