C. E. Ambrósio, “Placental fissure in mongrel cats, Felis catus - Linnaeus, 1758: gross and microscopical aspects”, Braz. J. Vet. Res. Anim. Sci., vol. 41, no. 2, pp. 81–85, Apr. 2004, doi: 10.1590/S1413-95962004000200001.