DAULAY, S. A.; SUBAGIO, S.; RITONGA, W. A. EXPERT SYSTEM TO DIAGNOSE DISEASES IN THE HUMAN DIGESTIVE SYSTEM USING THE FORWARD CHAINING METHOD CASE STUDY OF PUSKESMAS HUTAGODANG HEALTH CENTER. U-NET Jurnal Teknik Informatika, v. 8, n. 2, p. 22-28, 15 Mar. 2025.