1. Zur endoskopischen Beurteilung neoplastischer Wandveranderungen an Osophagus;Dollinger, H.,1972
2. Der diagnostische Wert von gezielten Biopsien bei Magentumoren;Hampel, K.E.; Stopik, D.; Niedobitek, F.;Zeitschift far Gastroenterologie,1974
3. Gastrobiopsy in cancer of the stomach;Hermanek, P.;Endoscopy,1973
4. Brushing cytology of the esophagus and stomach under direct vision by fiberscopes;Kobayashi, S.; Prolla, J.C.; Kirsner, J.B.;Acta Cytologica,1970
5. Exfoliative cytology in gastric ulcer. Its role differentiation of benign and malignant ulcers;Prolla, J.C.; Xavier, R.G.; Kirsner, J.B.;Gastroenterology,1972