G. Saviani, “Histology of ostrich intestine (Struthio camelus, Linnaeus 1758)”, Braz. J. Vet. Res. Anim. Sci., vol. 50, no. 4, pp. 265–269, Aug. 2013, doi: 10.11606/issn.2318-3659.v50i4p265-269.