1. Handbook and Atlas of Gastrointestinal Exfoliative Cytology;Prolla,1972
2. Cytologic intragastric brushing under direct vision: a new gastric brush;Christopher;Gastrointestinal Endoscopy,1969
3. Gastroscopic brush cytology — a supplement to gastric biopsy in earlier diagnosis of cancer;Wiendl;Endoscopy,1974
4. Gastric lavage cytology and biopsy for early gastric cancer under direct vision by the fibergastroscope;Kasugai;Gastrointestinal Endoscopy,1968
5. Gastrobiopsy in cancer of the stomach;Hermanek;Endoscopy,1973