1. General abortion references
2. Veterinary and medical aspects of abortion in Danish sheep;Agerholm;APMIS,2006
3. Pathogenesis of placentitis in the goat inoculated with Brucella abortus. I. Gross and Histologic Lesions;Anderson;Vet Pathol,1986
4. Congenital abnormalities of the goat;Basrur;Vet Clin of N Amer: Food Anim Pract,1993