1. Arullani, P, Paoluzi, P, Capurso, L: Endoscopy of the colon. Proc. 1 st. 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.