Zerwina, Salu, Yupianti Yupianti, and Hari Aspriyono. “Expert System to Diagnose Dental Impaction Disease Using Certainty Factor Method”. Jurnal Media Computer Science 1, no. 1 (January 25, 2022): 31–36. Accessed August 15, 2022. https://jurnal.unived.ac.id/index.php/jmcs/article/view/1911.