., Neha, and Pratistha Mathur. “Three Level Optimization Models of Scaled Gabor Features for Facial Expression Recognition”. International Journal of Engineering & Technology 7, no. 2.24 (April 25, 2018): 348–352. Accessed May 8, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/12080.