1. Hendren WH (1998) Cloaca, the most severe degree of imperforate anus. Ann Surg 228:331
2. Brock WA, Pena A (1992) Cloacal abnormalities and imperforate anus. In: Clinical Pediatric Urology, 3rd ed. Edited by P. P. Kelais, L. R. King and A. B. Belman. Philaelphia: W. B. Saunders Co., vol. 2, chapt. 19, pp. 920
3. Gillenwater JY, Grayhack JT (eds) (2002) Adult and paediatric Urology, 4th edn. Lippincott, Williams and Wilkins, Philadelphia
4. Levitt MA, Pena A (2012) Chapter 103: anorectal malformations. In: Coran AG, Caldamone A (eds) Pediatric surgery. Saunders (Elsevier), Philadelphia, pp 1289–1309
5. Pena A (1989) The surgical management of persistent cloaca: results in 54 patients treated with a posterior sagittal approach. J Ped Urol 24(6):590–598