Dhimas Dwi Putra Setiyawan. “Sistem Pakar Pendeteksi Awal COVID-19 Menggunakan Metode Certainty Factor”. SinarFe7 4, no. 1 (December 16, 2021): 443–450. Accessed April 29, 2024. https://journal.fortei7.org/index.php/sinarFe7/article/view/76.