RYAN-GRAHAM, M.; LESSELL, S. 34 year old man with headache, vertigo, clumsiness, and unsteady vision. Digital Journal of Ophthalmology, Boston, Massachusetts, USA, v. 2, n. 3, 1996. Disponível em: https://djo.harvard.edu/index.php/djo/article/view/729. Acesso em: 4 jun. 2026.