Wisana, I Dewa Gede Hari, Priyambada Cahya Nugraha, and Rizki Aulia Rachman. “Development of a Low-Cost and Efficient ECG Devices With IIR Digital Filter Design ”. Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics 3, no. 1 (August 17, 2025): 21–28. Accessed April 19, 2026. http://www.ijeeemi.org/index.php/ijeeemi/article/view/194.