Ehdaie, Behfar, et al. “Postoperative Nomogram for Disease Recurrence and Cancer-Specific Death for Upper Tract Urothelial Carcinoma: Comparison to American Joint Committee on Cancer Staging Classification”. Urology Journal, vol. 11, no. 2, May 2014, pp. 1435-41, doi:10.22037/uj.v11i2.1891.