Strittmatter F, Beck V, Stief CG, Tritschler S (August 2017). "[Urethral stricture : From diagnostics to appropriate treatment]". Urologe A (in German). 56 (8): 1047–1057. doi:10.1007/s00120-017-0443-z. PMID28685197.
El-Ghar MA, Osman Y, Elbaz E, Refiae H, El-Diasty T (July 2009). "MR urethrogram versus combined retrograde urethrogram and sonourethrography in diagnosis of urethral stricture". Eur J Radiol. 74 (3): e193–e198. doi:10.1016/j.ejrad.2009.06.008. PMID19608363.
Strittmatter F, Beck V, Stief CG, Tritschler S (August 2017). "[Urethral stricture : From diagnostics to appropriate treatment]". Urologe A (in German). 56 (8): 1047–1057. doi:10.1007/s00120-017-0443-z. PMID28685197.
El-Ghar MA, Osman Y, Elbaz E, Refiae H, El-Diasty T (July 2009). "MR urethrogram versus combined retrograde urethrogram and sonourethrography in diagnosis of urethral stricture". Eur J Radiol. 74 (3): e193–e198. doi:10.1016/j.ejrad.2009.06.008. PMID19608363.