Brindha Devi, V, S Sindhuja, S Shanthini, and M Hemalatha. “A Virtual Keyboard Security System for Automated Teller Machine”. International Journal of Engineering & Technology 7, no. 2.33 (June 8, 2018): 59–63. Accessed December 22, 2024. https://sciencepubco.com/index.php/ijet/article/view/13855.