D. S. Pine, L. Tierney Jr.: A stressful interaction. In: N Engl J Med., 1996, 334, S. 1530–1534. PMID 8618610 (Herzveränderungen bei Subarachnoidalblutung)
C. M. Fisher, J. P. Kistler, J. M. Davis: Relation of cerebral vasospasm to subarachnoid hemorrhage visualized by computerized tomographic scanning. In: Neurosurgery. 1980; 6, S. 1–9. PMID 7354892