Spontaneous pneumomediastinum in patients with COVID-19: A case series. Grande Medical Journal, [S. l.], v. 3, n. 1, p. 36–42, 2021. DOI: 10.3126/gmj.v3i1.79114. Disponível em: https://www.nepjol.info/index.php/gmj/article/view/79114. Acesso em: 4 jul. 2026.