Wijayanti, B., and A. S. Purnomo. “SISTEM PAKAR DIAGNOSA PENYAKIT GIGI MENGGUNAKAN CERTAINTY FACTOR DENTAL DISEASE DIAGNOSIS EXPERT SYSTEM USING THE CERTAINTY FACTOR METHOD”. Proceeding SENDI_U, July 2020, pp. 43-47, https://www.unisbank.ac.id/ojs/index.php/sendi_u/article/view/7958.