Ainippully, Arun M., Anoop P. V., Arun V., and Prathap S. “Utility of Urethral Ratio in Voiding Cystourethrogram to Identify Milder Variants of Posterior Urethral Valves”. International Surgery Journal 5, no. 5 (April 21, 2018): 1847–1851. Accessed November 7, 2025. https://www.ijsurgery.com/index.php/isj/article/view/2782.