BR.PURBA, D. E.; SIMANJORANG, R. M. Sistem Pakar Diagnosa Gangguan Pencernaan Pada Manusia Menggunakan Metode Certainty Factor. Jurnal Sains dan Teknologi, [S. l.], v. 3, n. 2, p. 36–42, 2022. DOI: 10.55338/saintek.v3i2.208. Disponível em: https://ejournal.sisfokomtek.org/index.php/saintek/article/view/208. Acesso em: 30 apr. 2026.