Bateman, A. et al. 2005. Bioefficacy Determination of Methionine Hydroxy Analog-Free Acid Relative to DL-Methionine in Laying Hen Diets with Limited Methionine Using Different Regression Models. International Journal of Poultry Science. 4, 9 (Aug. 2005), 628–632. DOI:https://doi.org/10.3923/ijps.2005.628.632.