SchindlerRudolf: Ein Völlig Ungefährliches, flexibles Gastroskop. Münchener Medizinischen Wochenschrift, 1932, Nr. 32, S. 1268.
2.
BenedictEdward B.: Examination of the Stomach by Means of a Flexible Gastroscope: A Preliminary Report. New EnglandJ. of Med., 210: 669–674, March 29, 1934.
3.
BenedictEdward B.: Chronic Gastritis, A Clinical Discussion Based on Gastroscopic Examination. New EnglandJ. of Med., 212: 468–472, March 14, 1935.
4.
ArafaM. A.: Discussion on the Diagnosis of Diseases of the Stomach. Proc. Royal Soc. of Med., Sect. of Med., 28: 777–780, April, 1935.
5.
JacksonChevalierJacksonChevalier L.: Peroral Gastroscopy, Including Examination of the Supradiaphragmatic Stomach. J. Amer. Med. Asso., 104: 269–274, January 26, 1935. Also: Bronchoscopy, Esophagoscopy and Gastroscopy, Ed. 3rd, W. B. Saunders Co., Philadelphia, 1935.
6.
JacksonChevalier: Gastroscopy. Med. Rec., April 6, 1907. Also: Tracheo-Bronchoscopy, Esophagoscopy and Gastroscopy. The Laryngoscope Co., St. Louis, 1907.