1. Arrufat-Boix JM (1992) Urachal leiomyoma. Arch Esp Urol 45: 251–253
2. Baxter GM (1992) Uroperitoneum attributable to ruptured urachus in a yearling bull. J Am Vet Med Assoc 200: 517–520
3. Chen WJ (1992) Abcess of urachal remnant mimicking urinary bladder neoplasm. Br J Urol 69: 510–512
4. Chevrel JP, Caix M, Champault G, Hureau J, Juskiewenski S, Marchac D, Neidhardt JPH, Rives J, Stoppa R (1985) Chirurgie des parois de l'abdomen. Springer, Berlin Heidelberg New York
5. Chigot M (1965) A propos des kystes suppurés de l'ouraque. Mem Acad Chir 91: 887–888