Nishfa Dewi, Wan, Hellena Deli, Safri Safri, Yulia Rizka, and Irwan Irwan. “Application of Precordial Lead ECG SafOne to Patients With Cardiovascular Disease: Evidence-Based Practice”. KnE Medicine 3, no. 2 (March 8, 2023): 120–128. Accessed June 30, 2024. https://knepublishing.com/index.php/KnE-Medicine/article/view/13044.