Oliveira, F. S. de, Machado, M. R. F., & Canola, J. C. (2003). Real time B-mode ultrasound in pacas pregnancy (Agouti paca, Linnaeus, 1766). Brazilian Journal of Veterinary Research and Animal Science, 40(1), 73-78. https://doi.org/10.1590/S1413-95962003000100009