MENON RAVUNNIARTH, L.; NARAYANA, G. K. Nasal endoscopic evaluation of patients presenting with frontal headache. International Journal of Otorhinolaryngology and Head and Neck Surgery, [S. l.], v. 6, n. 1, p. 137–142, 2019. DOI: 10.18203/issn.2454-5929.ijohns20195704. Disponível em: https://www.ijorl.com/index.php/ijorl/article/view/1850. Acesso em: 16 nov. 2025.