Color atlas of microneurosurgery : microanatomy, approaches, techniques. Vol. 2, Cerebrovascular lesions / W.T. Koos, R.F. Spetzler, J. Lang ; with contributions by G. Pendl, A. Perneczky ; drawings by I. Dobsak, G. Spitzer, S. Harrison.    Stuttgart :  G. Thieme,  1997 . 592 s.