Veri Arinal, and Nuary Inaldi Simarmata. “Expert System For Diagnosing Brain Tumors Using the Certainty Factor (CF) Method”. Repeater : Publikasi Teknik Informatika Dan Jaringan, vol. 3, no. 2, Feb. 2025, pp. 01-07, doi:10.62951/repeater.v3i2.387.