Dr. K P Jeswanth Kiran, Dr. Uma MA, Dr G Kalyan Kumar, Dr. Jagadish K, Dr. Pillarsetty Pavan Kumar, and Dr. N S Prasad, “Comparison of ccq, cat score & bode index in assessing severity and exacerbations of copd - a comprehensive study”, IJPRT, vol. 15, no. 2, pp. 272–279, Jul. 2025.