1. Lower esophageal ring;Goyal;N Engl J Med,1970
2. The lower esophageal ring: long-term follow-up of symptomatic and asymptomatic rings;Schatzki;Am J Roentgenol Rad Ther Nucl Med,1963
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. Dysphagia produced by a contractile ring in the lower esophagus;Ingelfinger;Gastroenterology,1953
5. Dysphagia due to a diaphragm-like localized narrowing in the lower esophagus (“lower esophagus ring”);Schatzki;Am J Roentgenol Rad Ther Nucl Med,1953