Pongantung, S., Paendong, M. S. and Latumakulita, L. A. (2024) “EXPERT SYSTEM FOR GASTRIC DISEASE DIAGNOSIS USING FORWARD CHAINING AND CERTAINTY FACTOR METHOD”, Indonesian Journal of Intelligence Data Science, 3(2), pp. 44–53. doi: 10.35799/ijids.v3i2.50076.