1. Malignant urachal lesions;Sheldon;J Urol,1984
2. The Bristol bladder tumour registry;Miller;Br J Urol,1969
3. Carcinoma of the urachus: report of one case and a review of the literature;Yu;Surgery,1975
4. Urachal remnants in asymptomatic children: sonography morphology;Leicher-Düber;Pediatr Radiol,1991
5. Urachal abnormalities;Kelalis,1992