1. Bruneton, J. N., Drouillard, J. P., Sabatier, J. C., Elie, G. P., Tavernicr, J. F.: Normal variants of the sella turcica. Comparison of plain radiographs and tomograms in 200 cases. Radiology 131, 99?104 (1979)
2. Fields, W. S., Bruetman, M. E., Weibel, J.: Collateral circulation of the brain, p. 21. Baltimore: Williams and Wilkins 1965
3. Janicki, P. C., Limbacner, J. P., Guinto, F. C., Jr.: Agenesis of the internal carotid artery with a primitive transsellar communicating artery. Am. J. Roentgenol. 132, 130?132 (1979)
4. Lie, T. A.: Congenital anomalies of the carotid arteries. An angiographic study and a review of the literature, pp. 35?51. Amsterdam: Excerpta Medica 1968
5. Naito, T., Mikami, Y., Nobuoka, J., Yoshimoto, I., Oshima, H.: Agenesis of internal carotid artery associated with aneurysm of anterior communicating artery. Neurol. Surg. (Tokyo), 5, 593?596 (1977)