Shah, A. S., G. S. Bhangu, R. S. Sandhu, K. S. Ded, and S. K. Mann. “Posterior Urethral Valve Presenting With Urethral Stone: A Challenging Diagnosis”. International Surgery Journal, vol. 3, no. 4, Dec. 2016, pp. 2254-6, doi:10.18203/2349-2902.isj20162864.