Jamshidnezhad, Amir, and Md Jan Nordin. “A Classifier Model Based on the Features Quantitative Analysis for Facial Expression Recognition”. International Journal on Advanced Science, Engineering and Information Technology 1, no. 4 (August 1, 2011): 391–394. Accessed July 22, 2024. https://ijaseit.insightsociety.org/index.php/ijaseit/article/view/81.