1. Baird, J. L., British Patent 285,738. 15 February, 1928.
2. Lichtleiter, eine Erfindung zur Anschauung innerer Theile und Krankheiten nebst der Abbildung;Bozzini;Z. pract. Arzneik. Wundarzneik. (Berlin),1806
3. Bush, I. M., Bush, S., Shene, W., et al.: Presentation, Annual Meeting, American Urological Association, San Francisco, May, 1980.
4. Bush, I. M., Fieldstone, P. R., Bush, S., et al.: Endoscopic biopsy of ureteral and renal pelvis lesions. Presentation, Annual Meeting, American Urological Association, Boston, May, 1981.
5. Ureteroscopy and renoscopy: A preliminary report;Bush;Chicago Med. Sch. Quart.,1970