Pongantung, Scheryl, Marline Sofiana Paendong, and Luther Alexander Latumakulita. 2024. “EXPERT SYSTEM FOR GASTRIC DISEASE DIAGNOSIS USING FORWARD CHAINING AND CERTAINTY FACTOR METHOD”. Indonesian Journal of Intelligence Data Science 3 (2):44-53. https://doi.org/10.35799/ijids.v3i2.50076.