B. R. R, H. K. Y. Focus Challenge Based Presentation Attack Detection in Face Authentication Systems Using Generative Adversarial Network. Int J Intell Syst Appl Eng [Internet]. 2023 Sep. 21 [cited 2025 Sep. 13];11(4):323-34. Available from: https://www.ijisae.org/index.php/IJISAE/article/view/3529