Spontaneous pneumomediastinum – a rare cause of chest pain and dyspnoe in children. Journal of Medical Science, Poznań, Poland, v. 90, n. 4, p. e570, 2021. DOI: 10.20883/medical.e570. Disponível em: https://jmsnew.ump.edu.pl/index.php/JMS/article/view/570. Acesso em: 31 jul. 2025.