Maulia, A. ., Purwadi, P. and Kusuma, B. A. . (2026) “Rule-Based Expert System for Personalized GERD Food Recommendations Using Forward Chaining and Certainty Factor in Indonesia”, Jurnal Teknik Informatika (Jutif). Purwokerto, 7(2), pp. 1468–1482. doi: 10.52436/1.jutif.2026.7.2.5477.