1. Electrocardiogram studies in llamas;Bastres;Jpn J Vet Res,1989
2. The physical examination;Braunwald,1992
3. The mechanism of the generation of the third and fourth heart sounds;Crevasse;Circulation,1962
4. Congenital heart disease in infancy and childhood;Friedman,1992
5. The clinical approach to heart disease: History and physical examination;Gompf,1988