Agwu, N. P., A. Khalid, and I. A. Mungadi. “Retained Urethral Catheter: Novel Method of Removal Using Trans-Rectal Ultrasound Guidance”. Asian Journal of Research and Reports in Urology, Vol. 2, no. 1, Aug. 2019, pp. 1-5, http://journalajrru.com/index.php/AJRRU/article/view/30092.