Zavrak, Sultan, Seyhmus Yilmaz, Huseyin Bodur, and Sinan Toklu. “The Implementation of Two-Factor Web Authentication System Based on Facial Recognition”. Global Journal of Computer Sciences: Theory and Research 7, no. 2 (May 16, 2018): 92–101. Accessed May 3, 2024. https://un-pub.eu/ojs/index.php/gjcs/article/view/3448.