1. Demonstration of a new gastroscope, the'Fiberscope';Hirschowitz, B.I.; Curtis, L.E.; Peters, C.W.,1958
2. Gastroduodenal endoscopy with the fiberscope-an analysis of 500 cases;Hirschowitz, B.I.; Balint, J.A.; Fulton, W.J.;Surg. Clin. N. Amer,1962
3. Morrissey, J. F., Tanaka, Y., and Thorsen, W. B. (1967). Gastroscopy. Gastroenterology, 53, 456-476.
4. Direct vision of the ampulla of Vater through the gastroduodenal fiberscope;Watson, W.C.;Lancet; Endoscopic canulation of the ampulla of Vater; a preliminary report,1966
5. The Mark 87 fiberoptic esophagogastroscope; a new instrument for visualization and direct vision biopsy of esophagus, stomach and duodenum. IInd world;Koch, H.; Bauerle, H.; Classen, M.,1970