Almeida, Adriana Helena de, Franklin de Almeida Sterman, and Maria Angélica Miglino. “Ultrasonographic Measurement of Placental Dimensions Normal Pregnant Boxers and Its Correlation to the Gestational Period”. Brazilian Journal of Veterinary Research and Animal Science 40, no. supl. (January 1, 2003): 136–140. Accessed April 27, 2024. https://www.revistas.usp.br/bjvras/article/view/11435.