Carvalho, C. F., M. C. Chammas, F. de A. Stermann, N. de Barros, and G. G. Cerri. “Duplex-Doppler Ultrasonography for Morfologycal and Hemodynamic Evaluation of Aorta and Cranial Mesenteric Arteries in Dogs”. Brazilian Journal of Veterinary Research and Animal Science, vol. 45, no. 1, Feb. 2008, pp. 24-31, doi:10.11606/issn.1678-4456.bjvras.2008.26716.