References
- Prineas J W, Mc Donald W I, Franklin R T. Demyelinating diseases. Greenfield's neuropathology7th edn, D Graham, P L Cantos. Arnold Press, London 2002; 523–526
- Knapik J R, Galloway D C. Atypical CT pattern in multiple sclerosis. Sthn Med J 1987; 80: 777–779
- Masdeu J C, Quinto C, Olivera C, Tenner M, Leslie D, Visintainer P. Open-ring imaging sign: highly specific for atypical brain demyelination. Neurology 2000; 7: 1427–1433