SAHU, P. K.; BOTHRA, J.; GOYAL, L. An unusual case of recurrent retropharyngeal abscess with incidental oesophageal fistula. International Journal of Otorhinolaryngology and Head and Neck Surgery, [S. l.], v. 8, n. 4, p. 424–427, 2022. DOI: 10.18203/issn.2454-5929.ijohns20220817. Disponível em: https://www.ijorl.com/index.php/ijorl/article/view/3485. Acesso em: 16 nov. 2025.