Untung Suropati, Rasiban, and Dadang Iskandar Mulyana. “Application Development of Coronary Heart Disease Expert System Using Android-Based Agile Scrumban Method”. Journal of Information Technology, computer science and Electrical Engineering 1, no. S1 (April 30, 2024): 46–52. Accessed December 22, 2024. http://ysmk.org/ejournal/index.php/jitcse/article/view/77.