Lal, Roshan, and Pratik Kumar. “A Hospital Based Cross Sectional Study of Clinical Picture and Spirometry Pattern on Interstitial Lung Diseases at a Tertiary Care Centre”. International Journal of Advances in Medicine 6, no. 4 (July 24, 2019): 1207–1211. Accessed December 25, 2025. https://www.ijmedicine.com/index.php/ijam/article/view/1752.