Busapogula, D. K., A. Rakesh, K. Sailaja, and P. Nithin Linga Reddy. “Early Use of Non-Invasive Ventilation for Acute Exacerbations of Chronic Obstructive Pulmonary Diseaseon General Respiratory Wards: A Prospective Study”. International Journal of Health Sciences, vol. 6, no. S4, July 2022, pp. 8479-87, doi:10.53730/ijhs.v6nS4.10694.