1. A Century of Upper Gastrointestinal Tract Endoscopy;Grant;Med. J. Aust.,1973
2. An improved method of and means for producing optical images;Baird;British Patent Specification,1928
3. A flexible fibrescope, using static scanning;Hopkins;Nature,1954
4. Fibreoptic endoscopy and the Barium Meal-Results and Implications;Cotton;Brit. med. J.,1973
5. So who needs Teaching;Cotton;Gastrointest. Endosc.,1974