Calamari, Claudia Veronica, Sílvia Ferrari, Frederico Fontoura Leinz, Carlos Frederico de Carvalho Rodrigues, Diorandi Bianchini, Fernando Ferreira, and Ricardo Augusto Dias. “Evaluation of Two Methods for Early Pregnancy Diagnosis in Ewes: Transrectal Ultrasonography and Pregnancy Detector for Small Ruminant (DPPR-80®)”. Brazilian Journal of Veterinary Research and Animal Science 40, no. 4 (January 1, 2003): 261–266. Accessed December 30, 2024. https://revistas.usp.br/bjvras/article/view/11330.