Kimura K, Takemoto T : An endoscopic recognition of the atrophic border and its significance in chronic gastritis. Endoscopy 3 : 87-97, 1969.
Yorimitsu Y et al. : A new procedure of color endoscopy with Brilliant Blue and its successful application to pan-endoscopy. Proceedings of the 3rd Asian-Pacific Congress of Digestive Endoscopy, Proceedings III 998-1001, 1980.