1. Dysphagia produced by contractile ring in lower esophagus;Ingelfinger;Gastroenterology,1953
2. Dysphagia due to diaphragm-like localized narrowing in lower esophagus (“lower esophageal ring”);Schatzki;Amer. J. Roentgenol.,1953
3. X-ray examination of the stomach: a description of the roentgenologic anatomy, physiology and pathology of the esophagus, stomach and duodenum;Templeton,1944
4. Surgical treatment of lower esophageal ring;Wilkins;New Engl. J. Med.,1963
5. Changing concepts in structure, function and disease of the lower esophagus;Gould;Amer. J. M. Sci.,1957