Halim, Stephanie, and Seng Hansun. “Penerapan Metode Certainty Factor Dalam Sistem Pakar Pendeteksi Resiko Osteoporosis Dan Osteoarthritis”. Ultima Computing : Jurnal Sistem Komputer 7, no. 2 (August 1, 2016): 59-69. Accessed May 3, 2024. https://ejournals.umn.ac.id/index.php/SK/article/view/233.