Pinto, Ana Carolina B. C. Fonseca, and Masao Iwasaki. “Radiographic Evaluation of the Cardiac Silhouette in Clinically Normal Poodles through the Vertebral Heat Size (VHS) Method”. Brazilian Journal of Veterinary Research and Animal Science, vol. 41, no. 4, Aug. 2004, pp. 261-7, https://doi.org/10.1590/S1413-95962004000400007.