Mubarak, Sadia, Muhammad Imran Majeed, and Muhammad Alamgir Khan. 2014. “TIME DOMAIN ANALYSIS OF HEART RATE VARIABILITY IN PATIENTS WITH CORONARY ARTERY DISEASE”. Pakistan Journal of Physiology 10 (1-2):21–4. https://pjp.pps.org.pk/index.php/PJP/article/view/546.