1. Development: the heart and great vessels;Bishop,1999
2. Vascular ring anomalies in the dog and cat;Ellison;Compend Contin Educ Pract Vet,1980
3. Vascular ring anomalies in the dog;Helphrey;Vet Clin N Am Small,1979
4. Vascular ring anomalies;Van Gundy;Compend Contin Educ Pract Vet,1989
5. Prevalence of cardiovascular disorders;Buchanan,1999