SINGH, N.; MEHER, R.; WADHWA, V.; ALI, M. R. Facial pain: a rare presenting symptom of sympathetic chain schwannoma. International Journal of Otorhinolaryngology and Head and Neck Surgery, [S. l.], v. 7, n. 9, p. 1559–1561, 2021. DOI: 10.18203/issn.2454-5929.ijohns20213300. Disponível em: https://www.ijorl.com/index.php/ijorl/article/view/3118. Acesso em: 17 jan. 2026.