J. N. Cavalcanti, E. M. I. Amstalden, J. L. Guerra, and L. C. Magna, “Osteosarcoma in dogs: clinical-morphological study and prognostic correlation”, Braz. J. Vet. Res. Anim. Sci., vol. 41, no. 5, pp. 299–305, Oct. 2004, doi: 10.1590/S1413-95962004000500002.