LOAKHAJORN, Kolawatch; ASSAWACHAIPORN, Thirapat; KHOWASINTH, Pichakorn. Cigarette Smoking: A Major Cause of Emphysema. International Journal of Formal Sciences: Current and Future Research Trends, Jordan, v. 15, n. 1, p. 112–122, 2022. Disponível em: https://ijfscfrtjournal.isrra.org/Formal_Sciences_Journal/article/view/730. Acesso em: 21 sep. 2025.