Samy, S. Selvakumara, Haribaabu V, Aksharan M Kumar, and Priya Bajpai. 2019. “EMOTION RECOGINATION USING LDA AND CNN IN E-LEARNING”. International Journal of Advanced Science and Technology 28 (7), 370 -78. http://sersc.org/journals/index.php/IJAST/article/view/451.