1. Gastroscopic color photography;Pickert;Amer. J. Dig. Dis.,1957
2. Progress in gastroscopic photography;Nelson;Bull. Gastrosc. Esophagosc.,1960
3. Progress of gastrocamera examination;Tasaka,1967
4. The current aspect of endoscopic examination in Japan;Ariga;Gastroent. Endosc.,1966
5. Intragastric photography;Colcher;Amer. J. Gastroent.,1966