A. C. B. C. F. Pinto and M. Iwasaki, “Radiographic evaluation of the cardiac silhouette in clinically normal Poodles through the vertebral heat size (VHS) method”, Braz. J. Vet. Res. Anim. Sci., vol. 41, no. 4, pp. 261–267, Aug. 2004, doi: 10.1590/S1413-95962004000400007.