1. Account of singular case of deglutition;Bayford,1794
2. Surgical relief for tracheal obstruction from vascular ring;Gross,1945
3. Congenital aortic vascular ring: Surgical considerations;Hallman;Arch. Surg.,1964
4. Reversal of blood flow through vertebral artery and its effect on cerebral circulation;Reivich,1961