Baker, D. H., A. B. Batal, T. M. Parr, N. R. Augspurger and C. M. Parsons. 2002. Ideal ratio (relative to lysine) of tryptophan, threonine, isoleucine and valine for chicks during the second and third weeks posthatch. Poult. Sci. 81:485-494.
Baker, D. H. and Y. Han. 1994. Ideal amino acid profile for broiler chicks during first three weeks post hatching. Poult. Sci. 73:1441-1447.
Byung-chul Park. 2006. Amino acid imbalance-biochemical and mechanism and nutritional aspect. Asian-Aust. J. Anim. Sci. 19(9):1361-1368.
Chung, T. K. and D. H. Baker. 1992. Apparent and true digestibility of a crystalline amino acid mixture and of casein comparison of values obtained with ileal-cannulated pigs and cecetomized cockerels. J. Anim. Sci. 70:3781-3790.
Corzo, A., E. T. Moran and D. Hoehler. 2003. Lysine needs of summer-reared male broilers form six to eight weeks of age. Poult. Sci. 82:1602-1607.
Gong, L. M., C. H. Lai, S. Y. Qiao, Defa Li, Y. X. Ma and Y. L. Lin. 2005. Growth performance, carcas cheracteristics, nutirent digestibility, and serum biochemical parameters of broilers fed low protien diets supplemented with various ratios of threonine to lysine. Asian-Aust. J. Anim. Sci. 18(8):1164-1170.
Han, Y. and D. H. Baker. 1994. Digestible lysine requirement of male and female broiler chicks during the period three to six weeks posthatching. Poult. Sci. 73:1739-1745.
Knowles, T. A. and L. L. Southern. 1998. The lysine requirement and ratio of total sulfur containing amino acids to lysine fir chicks fed adequate or inadequate lysine. Poult. Sci. 77:564-569.
Leclercq, B. 1998. Specific effect of lysine on broiler production: Comparison with threonine and valine. Poult. Sci. 77:118-123.
Mack, S., D. Bercovici, G. De Groote, B. Leclercq, M. Pack, J. B. Schutte and Van Cauwenberghe. 1999. Ideal amino acid profile and dietary lysine specifications for broiler chickens from 20 to 40 days of age. Br. Poult. Sci. 40:257-265.
Morris, T. R. 1989. The interpretation of response data from animal feeding trials. In: Recent Developments in Poultry Nutrition (Ed. D. J. A. Cole and W. Heresign). Butterworhts, UK.
National Research Council. 1994. Nutrient requirements of poultry. 9th rev. ed. National Academy Press, Washington, DC.
Parsons, C. M. 1991. Amino acid digestibility in feedstuffs for poultry: Feedstuff evaluation and requirements. Biokyowa Technical Review No. pp. 1:1-15.