Ludwig, D. J., K. T. Buddingh, J. J. Kums, R. F. Kropman, H. Roshani, and W. H. Hirdes. “Treatment and Outcome of Fibroepithelial Ureteral Polyps: A Systematic Literature Review”. Canadian Urological Association Journal, vol. 9, no. 9-10, Sept. 2015, pp. E631-7, doi:10.5489/cuaj.2878.