1. Perineal lacerations;Embertson,1990
2. Diseases of the vagina, vestibule and vulva;LeBlanc,1999
3. The vulva, vestibule, vagina and cervix;Woodie,2006
4. Surgical management of perineal lacerations and rectovestibular fistulae in the mare: a retrospective study of 47 cases;Colbern;J Am Vet Med Assoc,1985
5. The female genital system;Vaughan,1988