Husna, Junaina, Sanusi, and Kasyfunnur. “Design of a Web-Based Expert System Using Certainty Factors for Internal Disease Diagnosis”. Jurnal Inotera 8, no. 1 (January 29, 2023): 34-42. Accessed April 30, 2026. https://inotera.poltas.ac.id/index.php/inotera/article/view/199.