1. Transitional cell cancer: upper tracts and bladder;Droller,1986
2. Surveillance, epidemiology and end results (SEER) program;National Institutes of Health, U.S. Department of Health, Education and Welfare;Classification for extent of disease, Book 6,1978
3. Renal pelvic tumors;Grabstald;JAMA,1971
4. Renal pelvis and ureter,1988