SINGLA, A.; GUPTA, S.; KHAN, W. F. Spontaneous alveolo-pleural fistula in a case of COVID-19 pneumonia-challenges and solutions: case report. International Surgery Journal, [S. l.], v. 9, n. 1, p. 229–232, 2021. DOI: 10.18203/2349-2902.isj20215162. Disponível em: https://www.ijsurgery.com/index.php/isj/article/view/8336. Acesso em: 13 oct. 2025.