R. Rauniyar, C. Agrawal, M. Gupta, K. Ahmad, A. Gupta, and S. Baboo, “Comparative Study of Sonourethrography and Radiographic Urethrogaphy in Urethral Lesions”, Nep J Radiology, vol. 3, no. 1, pp. 33–39, Sep. 2013.