ชาติรังสรรค์ ม., & ตั้งมณี ช. (2013). Effects of Typefaces, Rotations and Sets of Characters of text-based CAPTCHA on Human Affirmative Rates. JOURNAL OF INFORMATION SCIENCE AND TECHNOLOGY, 4(2), 16–23. https://doi.org/10.14456/jist.2013.9