Syifaun Nafisah, and Nazrul Effendy. “Voice Biometric System: The Identification of the Severity of Cerebral Palsy Using Mel-Frequencies Stochastics Approach”. International Journal of Integrated Engineering, vol. 11, no. 3, Sept. 2019, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/4663.