1. Oesophageal diverticula;Thomas;Br J Surg,2001
2. Diffuse esophageal spasm and related disorders;Ellis,1987
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4. Krankheiten des Oesophagus;Zenker,1877
5. Pharyngeal (Zenker‘s) diverticulum is a disorder of upper esophageal sphincter opening;Cook;Gastroenterology,1992