Waldroup, P.W., J.H. Kersey, and M.T. Kidd. 2002. “Dietary Interactions Between Threonine and Crude Protein in Diets for Growing Tom Turkeys 8 to 12 Weeks of Age”. International Journal of Poultry Science 1 (4): 74–77. https://doi.org/10.3923/ijps.2002.74.77.