Fathinah, Nadiva Azro, Suryani Suryani, and Anita Desiani. “Implementation of Certainty Factor in Expert System for Oil Palm Disease Diagnosis”. Jurnal Teknik Informatika dan Sistem Informasi 11, no. 3 (December 15, 2025): 405–414. Accessed February 26, 2026. http://114.7.153.31/index.php/jutisi/article/view/11886.