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Williams, Hayden E., Mike D. Tokach, Steve S. Dritz, Joel M. DeRouchey, Jason C. Woodworth, Robert D. Goodband, and Jose A. Soto. "209 Effects of High Standardized Ileal Digestible Tryptophan: Lysine Ratios With Ractopamine HCL On Growth and Carcass Performance of Pigs From 110 to 135 Kg." J Anim Sci 2020.

Williams, Hayden E., et al. "209 Effects of High Standardized Ileal Digestible Tryptophan: Lysine Ratios With Ractopamine HCL On Growth and Carcass Performance of Pigs From 110 to 135 Kg." J Anim Sci 2020.