Despa Prasetyo Wardoyo, and Fatma Sari Hutagalung. “Development Of A Web-Based Expert System For Healthy Diet Menu Recommendations Using The Certainty Factor Method”. Jurnal Sahabat ISNU SU 2, no. 1 (May 30, 2025): 86–95. Accessed August 14, 2026. https://journal.isnu-sumut.org/index.php/jsisnu/article/view/1258.