1. Radiology of the urinary bladder and urethra;Park,1978
2. The urogenital system;Evans,1993
3. The pelvis and reproductive organs of the carnivores;Dyce,1996
4. Positive contrast retrograde urethrography—a useful procedure for evaluating urethral disorders in the dog;Ticer;Vet Radiol Ultrasound,1980
5. Effects of bladder distension on canine and feline retrograde urethrography;Johnston;Vet Radiol Ultrasound,1983