1. The esophagus: anatomy, physiology, and disease. Motor disorders;Clouse,1989
2. Motor disorders of the esophagus;Ouyang,1985
3. Pneumatic dilation in the management of achalasia: experience of 45 cases;Dellipiani;Q J Med,1986
4. To dilate or operate? That is the question;Vantrappen;Gut,1983
5. Pneumatic dilation in achalasia;Fellows;Gut,1983