ANANDAPPA, M. H.; MATHEWS, S.; NATARAJAN, K.; S., R.; KAMESWARAN, M. Covid associated orbital apex syndrome: Madras ENT Research Foundation experience. International Journal of Otorhinolaryngology and Head and Neck Surgery, [S. l.], v. 7, n. 9, p. 1513–1516, 2021. DOI: 10.18203/issn.2454-5929.ijohns20213289. Disponível em: https://www.ijorl.com/index.php/ijorl/article/view/3090. Acesso em: 28 mar. 2026.