Khoshnevisan, M. H., M. Deghatipour, A. EbnAhmady, and H. Keshavarz. “Smoking and Exposure to Environmental Tobacco Smoke Among Health Occupations Students in Iran”. Journal of Contemporary Medical Sciences, vol. 6, no. 3, June 2020, pp. 109-13, doi:10.22317/jcms.v6i3.766.