Primary Medullary Hemorrhage:Report of Four Cases and Review of the Literature
Stroke 25:1684-1687, Barinagarrementeria,F.&Cantu,C., 1994
Vascular Malformations of the Posterior Fossa, Clinical & Radiologic Features
Arch Neurol 44:965-969, Silber,M.H.,et al, 1987