Putri, Dian Khairani, Defrianto Defrianto, Zulkarnain Zulkarnain, and Rakhmawati Farma. “Electrocardiogram Signal Analysis Using Fast Fourier Transform Method for Heart Rate Diagnosis”. Science, Technology, and Communication Journal 7, no. 1 (October 31, 2026): 159-170. Accessed November 1, 2026. https://www.sintechcomjournal.com/index.php/stc/article/view/319.