Abdeldayem, Mohamed, Hesham F. A. Hamed, and Amr M. Nagy. “Facial Expression Recognition: A Survey of Techniques, Datasets, and Real-World Challenges”. Statistics, Optimization & Information Computing 15, no. 1 (October 23, 2025): 733-761. Accessed January 22, 2026. http://47.88.85.238/index.php/soic/article/view/2789.