M, Muniyappa, Vatsala S. Rao, and Vidya KB. “To Evaluate the Role of Sputum in the Diagnosis of Lung Cancer in South Indian Population”. International Journal of Research in Medical Sciences 2, no. 2 (January 23, 2017): 545–550. Accessed October 12, 2025. https://www.msjonline.org/index.php/ijrms/article/view/2195.