4Van Gijn J, van Dongen K J, Vermeulen M, et al. Perimesencephalic nonaneurysmal hemorrhage:A nonaneurysmal and benign of subarachnoid hemorrhage [J]. Neurology, 1985,35 (4):493-497.
5Van GJ, Van DJ. Computeried tomography subarachnoid hemorrhage :difference between patients with and without an aneurysm on angiography[J]. Neurology,1980(30):538-540.
6Schwartz TH, Solomom RA. Perimesencephalic nonaneurysmal subarachnoid hemorrhage: review of the lierature [J]. Neurosurgery, 1996,39(3) :433-436.
7Van Calenbergh F, Plets C, Goffin J, et al. Nonaneurysmal subarachnoid hemorrhage: Prevalence of perimesencephalic hemorrhage in a consecutive series [J ]. Surg Neurol, 1993,39 (4): 320-325.
8Rinkel GLE, Wijdicks E, Hasam D, et al. Outcome in patients with subarachnoid hemorrhage and negative angiography according to patients of hemorrhage on computed tomography [J]. Lancet,1991,338 (8873): 964-967.
9Theodore H, Stephan A. Quadrigeminal variant of perimesencephalic nonaneurysmal subarachnoid hemorrhage [J].Neurosurgery, 2000,46 (3): 584.
10Van Gijn J, Van Dongen K J, Vermeulen M, et al. perimesencephalic hemorrhage:a nonaneurysmal and benign form of subarachnoid hemorrhage [J]. Neurology, 1985,35: 493-497.