[1]
A. H. de Almeida, F. de A. Sterman, and M. A. Miglino, “Ultrasonographic measurement of placental dimensions normal pregnant Boxers and its correlation to the gestational period”, Braz. J. Vet. Res. Anim. Sci., vol. 40, no. supl., pp. 136-140, Jan. 2003.