An enhancement of CAPTCHA algorithm used in protecting website registration - Lenie P. Nieves and Ankathereen F. Santos. 4 0 16; 5 (2012)
Undergraduate Thesis: (BS in Computer Studies major in Computer Science) - Pamantasan ng Lungsod ng Maynila, 2012.
Keywords: 2 -- 0; 6; 20; 20; 2