Iwasaki, M., F. de A. Sterman, and S. da S. Crochik. “Vesical Calculi in Dogs: A Radiographic Study”. Brazilian Journal of Veterinary Research and Animal Science, vol. 34, no. 1, Feb. 1997, pp. 12-15, doi:10.11606/issn.2318-3659.v34i1p12-15.