Clin. Path. ConferenceFibrillary Astrocytoma of Medulla, with Invasion of Subarachnoid Space, Case Record 6-1981, NEJM 304, 3430,1981., 1981
Epidermoid Tumors Involving the Fourth VentricleNeurosurgery 9:9-13, Rosario,M.,et al, 1981