1. Neonatal hydronephrosis: 146 cases;Lebowitz;Radiol Clin North Am,1977
2. Ureteropelvic junction;Flashner,1992
3. Pelvic hydronephrosis in children: a review of 219 personal cases;Johnston;J Urol,1977
4. Ureteropelvic obstruction in children: experiences with 109 cases;Kelalis;J Urol,1971
5. Pelviureteric obstruction in infancy;Robson;J Pediatr Surg,1976