1. Christensen G. C.: Anatomy of the dog. pp 760 and 782, W. B. Saunders Company, Philadelphia London 1964.
2. The extravesical ectopic ureter
3. Solitary Ectopic Ureter
4. Kjellberg S. R., Ericsson N. O., Rudhe U.: The lower urinary tract in childhood. Chicago, Year Book Publishers (1957), 103.