Bellaver, C., Parsons, C. and A. Easter, R. (1998) “Estimates of true amino acid digestibilities in feed ingredients using precision-fed, cecectomized roosters”, Pesquisa Agropecuaria Brasileira, 33(5), pp. 731–736. doi: 10.1590/S1678-3921.pab1998.v33.4884.