Bonatelli, M. et al. 2001. Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy. Brazilian Journal of Veterinary Research and Animal Science. 38, 5 (Jan. 2001), 224–228. DOI:https://doi.org/10.1590/S1413-95962001000500005.