Aldisa, Rima Tamara. “Expert System for Detecting Early Symptoms of Gastroesophageal Reflux Disease (GERD) Method Case Based Reasoning (CBR) Using Mobile Android”. Jurnal Mantik 4, no. 4 (February 1, 2021): 2563-2567. Accessed June 19, 2026. https://iocscience.org/ejournal/index.php/mantik/article/view/1210.