Swadi, Huda, and Hamid Ali. “Mobile-Based Human Emotion Recognition Based on Speech and Heart Rate”. Journal of Engineering 25, no. 11 (October 29, 2019): 55-66. Accessed November 17, 2019. http://joe.uobaghdad.edu.iq/index.php/main/article/view/j.eng.2019.11.05.