“Prospective Study Of Non Invasive Ventilation In Acute Exacerbation Of Chronic Obstructive Pulmonary Disease”. Indian Journal of Applied-Basic Medical Sciences 22, no. 35 (July 7, 2020): 368–377. Accessed May 23, 2025. https://www.journals.acspublisher.com/index.php/ijabms/article/view/1495.