PRASETYO, D. Gastric Acid Diagnosing Expert System Using Certainty Factor Method. Journal of Intelligent Decision Support System (IDSS), [S. l.], v. 3, n. 2, p. 40-45, 2020. Disponível em: https://idss.iocspublisher.org/index.php/jidss/article/view/55. Acesso em: 24 apr. 2026.