1. ARULLANI, P., PAOLUZI, P., CAPURSO, L.: Endoscopy of the colon. Proc. 1st. Europ. Congr. Digestive Endoscopy. Praque 1968: Basel-New York: Karger 1969.
2. BLANKENHORN, D.H., HIRSCH, J., AHRENS, E.H. JR.: Transintestinal intubation: technic for measurement of gut length and physiologie sampling at known loci. Proc. Soc. exp. Biol. (N.Y.) 88, 356 (1955).
3. COLAGRANDE, C., ARULLANI, P., CASALE, C.: A suction biopsy procedure for obtaining specimens of mucosa from the right and left colon. Amer. J. dig. Dis. 2, 389 (1966).
4. DEMLING, L., FRüHMORGEN, P.: Coloscopy-technique and clinical results. Vortrag V. Congreso Latino Americano de Proctologia, Mexico, Mai 1972.
5. DEYHLE, P.: Duodenoskopie-Koloskopie. Vortrag. EECO Symposion, München 1970.