Barrera, R., J. Duque, P. Ruiz, and C. Zaragoza. “Accuracy of Ultrasonographic Measurements of Kidney Dog for Clinical Use”. Revista Científica De La Facultad De Ciencias Veterinarias, Vol. 19, no. 6, 1, http://www.produccioncientificaluz.org/index.php/cientifica/article/view/15500.