Shivani Saini, Rajesh Kumar, Nitish Thakur, Kiran Kumar Singal, Nehal Patel, and Luqman Hafeez. “Electrocardiographic Changes in COVID-19 Pneumonia: A Cohort Study”. International Journal of Health and Clinical Research 4, no. 15 (August 30, 2021): 122–125. Accessed February 6, 2026. https://ijhcr.com/index.php/ijhcr/article/view/2441.