Bateman, Andrew, Zhenhua Liu, and David A. Roland Sr. 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): 628–632. https://doi.org/10.3923/ijps.2005.628.632.