Rahman, Andy, Mefri Yanni, and Masrul Syafri. “Diagnostic Test Squatting Stress Echocardiography and Coronary Angiography in Diagnosing Coronary Heart Disease”. Indonesian Journal of Cardiology 37, no. 4 (April 18, 2017): 190-8. Accessed November 26, 2024. https://ijconline.id/index.php/ijc/article/view/583.