SUPRAYITNO, S. D. A.; ZAKARIA, M. N.; YULIANTO, A. W. COVID-19 Disease Diagnosis Expert System with Certainty Factor Method using iOS-Based App. Journal of Telecommunication Network (Jurnal Jaringan Telekomunikasi), [S. l.], v. 12, n. 3, p. 160-165, 2022. DOI: 10.33795/jartel.v12i3.336. Disponível em: https://jartel.polinema.ac.id/index.php/jartel/article/view/336. Acesso em: 17 apr. 2024.