SAHAY, A. S.; FITRIAH, A. N.; CHRISTIAN, E. Sistem Pakar Diagnosa Penyakit Lambung Berbasis Website Menggunakan Metode Forward Chaining & Certainty Factor. Journal of Information Technology and Computer Science, [S. l.], v. 1, n. 3, p. 192–201, 2021. DOI: 10.47111/jointecoms.v1i3.8813. Disponível em: https://e-journal.upr.ac.id/index.php/jcoms/article/view/8813. Acesso em: 31 aug. 2025.