Sondos Majdi Taher, Marit van Silfhout, and Asiya Nazir. “The Effect of Exercising on Smokers’ Lung Capacity”. International Journal of Research in Pharmaceutical Sciences 10, no. 4 (November 5, 2019): 3420-3439. Accessed December 11, 2019. https://pharmascope.org/index.php/ijrps/article/view/1658.