2Peter Langhans M.D.,Ralph A. Heger M.D.,J. Hohenstein,Werner Schlake M.D,Hermann Bünte M.D.. Operation-sequel carcinoma of the stomach. Experimental studies of surgical techniques with or without resection[J] 1981,World Journal of Surgery(4):595~605
3Rudolf Schindler. On the comparison between gastric suction biopsies and gastroscopy[J] 1955,American Journal of Digestive Diseases(11):336~337