Satyanarayana, B., V. Devendar Reddy, and E. Syamala. “Peak Expiratory Flow Rate; the Effect of Smoking on Younger & Middle Aged Males”. International Journal of Research in Medical Sciences 1, no. 4 (January 28, 2017): 441–442. Accessed May 26, 2026. https://www.msjonline.org/index.php/ijrms/article/view/2645.