S. Çelik, M. Y. . Samancı, H. . Demirkol, and S. E. . Çelik, “Perimesencephalic (Pretruncal) Nonaneurysmal Subarachnoid Hemorrhage: Case Report”, J Nervous Sys Surgery, vol. 3, no. 1, pp. 28–30, Jun. 2010.