1. Agnoli, A., Subarachnoidalblutung bei embryonalen Gefäßen. Internationales Symposium über ?die Diagnostik und Therapie der spontanen Subarachnoidalblutungen?. Graz 28.?30. Juni 1973.
2. Altmann, F., Anomalies of the internal carotid artery and its branches; their embryological and comparative anatomical significance. Report of a new case of persistent stapedial artery in man. Laryngoscope (St. Louis)57 (1947), 313?339.
3. Anderson, M., Persistent primitive hypoglossal artery with basilar aneurysm. J. Neurol.213 (1976), 377?381.
4. Basset, C. T., Lemmen, J. L., Intracranial aneurysms. Some clinical observations concerning their development in the posterior circle of Willis. J. Neurosurg.11 (1954), 135?142.
5. Batujeff, N., Eine seltene Arterienanomalie. (Ursprung der A. basilaris aus der A. carotis interna. Anat. Anz.4 (1889), 282?285.