Muangprathub, Jirapond, Oatchima Shichim, Yuthaya Jaroensuk, and Siriwan Kajornkasirat. 2018. “Automatic Grading of Scanned Multiple Choice Answer Sheets”. International Journal of Engineering & Technology 7 (2.23): 175-79. https://doi.org/10.14419/ijet.v7i2.23.11910.