Oyama MA, Sisson DD, Bulmer BJ, Constable PD.  2004.  Echocardiographic estimation of mean left atrial pressure in a canine model of acute mitral valve insufficiency.. Journal of veterinary internal medicine / American College of Veterinary Internal Medicine. 18(5):667-72. Abstract
Kutzler MA, Bildfell RJ, Gardner-Graff KK, Baker RJ, Delay JP, Mattson DE.  2004.  West Nile virus infection in two alpacas.. Journal of the American Veterinary Medical Association. 225(6):921-4,880. Abstract
Sisson DD.  2004.  Neuroendocrine evaluation of cardiac disease.. The Veterinary clinics of North America. Small animal practice. 34(5):1105-26. Abstract