S V S Prasad, Banoth Ravi, Mondru Sathish. “Real-Time Face Expression and Emotion Detection Using Machine Learning and CNN”. Design Engineering, no. 1 (December 30, 2022): 4772 - 4785. Accessed May 18, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/9827.