1. Nutrient Requirements of Poultry;National Research Council,1994
2. Growth in chicks fed amino acids;Hegsted;J. Biol. Chem.,1944
3. The amino acid requirements of the chick;Almquist;J. Nutr.,1944
4. The threonine requirement of the chick;Grau;J. Nutr.,1949
5. Utilization of isomers and analogs of amino acids and other sulfur compounds;Baker,1986