1. Abbott M, Namiki H (1968) Congenital ependymoma. Case report. J Neurosurg 28:162?165
2. Albert F (1982) Spontaneous haemorrhage in intracranial tumours. A clinical report of 50 cases. Acta Neurochir (Wien) 62:143?144
3. Casentini L, Gullotta F, M�hrer U (1981) Clinical and morphological investigations on ependymomas and their tissue cultures. Neurochirurgia (Stuttg) 24:51?56
4. Coulon RA, Till K (1977) Intracranial ependymomas in children. A review of 43 cases. Child's Brain 3:154?168
5. De Grood MP (1967) Hemoragie sous-arachno�dience comme premier sympt�me dans un �pendymome intraventriculaire (� propos de deux cas). Neurochirurgie 13:660?662