SMIT, F.; OELOFSE, A.; LINEGAR, A.; BOTES, L.; TURTON, E. Supplemental oxygen therapy in COVID-19. SA Heart Journal, [S. l.], v. 17, n. 3, p. 324–328, 2020. DOI: 10.24170/17-3-4379. Disponível em: https://www.journals.ac.za/SAHJ/article/view/4379. Acesso em: 13 oct. 2025.