Fernandes, Jovanir Inês Müller, et al. “Influence of Breeder Age on Biometrics Organ and Morphology of the Mucosa of the Small Intestine of Chicks Hatching”. Semina: Ciências Agrárias, vol. 35, no. 2, Apr. 2014, pp. 1083-90, doi:10.5433/1679-0359.2014v35n2p1083.