1. Zystoskopische Diagnostik;Bozzini,1966
2. Cited by Silander in his paper. Hysteroscopy through a transparent rubber balloon in patients with carcinoma of the uterine endometrium;Pantaleoni;Acta Obstet Gynec Scand,1963
3. L’endoscope et des Ses Applications au Diagnostic et au Traitement des Affections de L’urethre et de la Vessie;Desormeaux,1865
4. Über eine neue Behandlungsmethode der Höhlen des menschlichen Körpers;Nitze,1879
5. Leiter. Cited by Nitze in his article.