(1)
Almeida, A. H. de; Sterman, F. de A.; Miglino, M. A. Ultrasonographic Measurement of Placental Dimensions Normal Pregnant Boxers and Its Correlation to the Gestational Period. Braz. J. Vet. Res. Anim. Sci. 2003, 40 (supl.), 136-140. https://doi.org/10.1590/S1413-95962003000800007.