Nascimento Peres, Patricia Cesar, et al. “Prevalence and Respiratory Function Study of Passive Child Smokers in the City of Santa Fe, Paraná and Its Association With Socioeconomic Level”. O Mundo Da Saúde, vol. 41, no. 03, July 2017, pp. 298-05, doi:10.15343/0104-7809.20174103298305.