1. Bladder Tumors: A Symposium. Philadelphia-Montreal: J. B. Lippincott Comp. 1956.
2. Bricker, E. M.: Amer. Surg.18, 654 (1952).
3. Broders, A. C.: Ann. Surg.75, 574 (1922).
4. Cordonnier, J. J., andW. B. Seaman: J. Urol. (Baltimore)76, 256 (1956).
5. Franksson, C.: Acta chir. scand. Suppl.151, 1–203 (1950).