Saxena, Vikas, Jyoti Batra, Tapan Mohapatra, Shashi Saxena, and Anurag Agarwal. “Coexistence of CVD in COPD: A Hospital Base Study”. International Journal of Health and Clinical Research 4, no. 5 (March 15, 2021): 233–236. Accessed February 4, 2026. https://www.ijhcr.com/index.php/ijhcr/article/view/1124.