1. Doppler echocardiography I;Bonagura;Veterinary Clinics of North America,1998
2. Congenital heart disease;Boon,1998
3. Use of pulsed-wave Doppler echocardiography to determine aortic and pulmonary velocity and flow variables in clinically normal dogs;Brown;American Journal of Veterinary Research,1991
4. Causes and prevalence of cardiovascular disease;Buchanan,1992
5. Changing breed predispositions in canine heart disease;Buchanan;Canine Practice,1993