1. Hirschowitz, B. I., Curtiss, L. E., Peters, C. W. et al. (1958). Demonstration of a new gastroscope “Fiberscope”. Gastroenterology, 30, 50.
2. Deyhle, P. and Demling, L. (1971). Goloscopy - technique, results, in dications. Endoscopy, 3, 143.
3. Williams, C. B. and Muto, T. (1972). Examination of the whole colon with fibreoptic colonoscope. Br. Med. J., 3, 278.
4. Overholt, B. F. (1975). Colonoscopy - a review. Gastroenterology, 68, 1308.
5. Geenen, J. E., Schmitt, W. G.Jr. and Hogan, W. J. (1974). Complications of colonoscopy. Gastrointest. Endosc., 66, 812