Sujata, Joshi, Damle Madhavi, and Kumar Vishal. “Facial Emotion Detection Technology: Concept, Marketing Applications, Business Drivers and Challenges”. International Journal of Engineering and Technology 7, no. 1.9 (March 1, 2018): 149–156. Accessed May 13, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/9753.