Fialho, E. T. and Cline, T. R. (1991) “Influence of environmental temperature on nitrogen retention apparent digestibility of protein and amino acids and energy balance in growing pigs”, Pesquisa Agropecuaria Brasileira, 26(8), pp. 1237–1253. doi: 10.1590/S1678-3921.pab1991.v26.3462.