1. Long-term evaluation of colposuspension in the treatment of urinary incontinence due to incompetence of the urethral sphincter mechanism in the bitch;HOLT, P.E.,1990
2. Diagnosis and management of canine urethral sphincter mechanism incompetence;HOLT, P.E.;Waltham Focus; Canine ureteral ectopia: an analysis of 175 cases and comparison of surgical treatments,1999
3. Retrograde vaginourethrogram of a bitch with a vestibulovaginal stenosis. This anomaly was previously considered to be a cause of incontinence but is often an incidental finding in normal bitches and is of doubtful significance. This individual was presented for investigation of mating difficulties Further reading;GREGORY, S.P.;British Veterinary Journal; Developments in the understanding of the pathophysiology of urethral sphincter mechanism incompetence in the bitch,1994