1. Use of direct vision biopsy in the diagnoses of gastroesophageal malignancy;Kobayashi;Gastrointestinal Endoscopy,1971
2. Diagnosis of stenosing lesions of the esophagus using brush cytology;Cohen;Gastrointestinal Endoscopy,1969
3. Endoscopic biopsy and cytology in esophageal and gastric carcinoma with the fiberesophagoscope;Yoshii;Castrointestinal Endoscopy,1971
4. A Comparison of endoscopic biopsy and esophageal exfoliative cytology in establishing the diagnosis of carcinoma of the esophagus;Hookman;Gastrointestinal Endoscopy,1966
5. A comparison of washing and brushing cytology and biopsy in the diagnosis of malignant disease of the esophagus, stomach, and colon;Bedine;Gastrointestinal Endoscopy,1972