Nguyen, Chi Cuong, Giang Son Tran, Thi Phuong Nghiem, Jean-Christophe Burie, and Chi Mai Luong. 2019. “Real-Time Smile Detection Using Deep Learning”. Journal of Computer Science and Cybernetics 35 (2):135-45. https://doi.org/10.15625/1813-9663/35/2/13315.