1. Laparoscopy;Boyce,1975
2. Endoscopy of the stomach and duodenum;Colcher,1974
3. Gastrointestinal endoscopy. Current concepts;Colcher;New Engl. J. Med.,1975
4. A procedure for the examination of the liver and pancreas in dogs;Dalton;J. Small Anim. Pract.,1972
5. Esophagogastric endoscopy in small animal medicine. An abstract;Johnson;Gastrointestinal Endoscopy,1976