1. X-ray examination of the stomach: a description of the roentgenologic anatomy, physiology and pathology of the esophagus, stomach and duodenum;Templeton,1944
2. Dysphagia produced by a contractile ring in the lower eosphagus;Ingelfinger;Gastroenterology,1953
3. Dysphagia due to a diaphragmlike localized narrowing in the lower esophagus (“lower esophageal ring”);Schatzki;Am J Roentgenol,1953
4. Frequency of the asymptomatic lower eosphageal contractile ring;Kramer;N Engl J Med,1956
5. Lower esophageal web;Bugden;J Thorac Surg,1956