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2. Endosonography is superior to computed tomography in staging tumors of the esophagus and the cardia [Abstract];Ziegler;Gastroenterology,1988
3. Beltrag der endosonographie zum praoperativen staging bei osophagus und magencarcinom;Grimm;Chirurg,1989
4. Staging of oesophageal carcinoma: comparison of results with endoscopic sonography and CT;Vilgrain;AJR Am J Roentgenol,1990
5. Gastroenterologic endosonography;Rosch,1992