H. J. Stein

Flexible versus rigid endoscopy for treatment of foreign body impaction in the esophagus

G. Oberascher, C. Meco, H. Stein, 2007, Surgical Endoscopy.

Barrett's esophagus: Pathogenesis, epidemiology, functional abnormalities, malignant degeneration, and surgical management

J. Siewert, H. Stein, H. J. Stein, 2005, Dysphagia.