Kurniawan, Indra. “Design and Build an Expert System in the Diagnosis of Ear, Nose and Throat Diseases by Using the Certainty Factor Method”. Journal of Intelligent Decision Support System (IDSS) 3, no. 2 (June 30, 2020): 46-50. Accessed April 24, 2026. https://idss.iocspublisher.org/index.php/jidss/article/view/56.