Alfaiz, Muhamad, Iskandar Fitri, and Novi Dian Nathasia. 2020. “Expert System of Early Detection of Arthritis With Web-Based Certainte Fector Method: Expert System of Early Detection of Arthritis With Web-Based Certainte Fector Method”. Jurnal Mantik 3 (4):400-411. https://www.ejournal.iocscience.org/index.php/mantik/article/view/582.