1. Nutrient Requirements of Poultry;National Research Council,1994
2. The effect of dietary tryptophan on aggressive behavior in developing and mature broiler breeder males;Shea;Poult. Sci.,1990
3. Behavioral responses of broiler chickens to handling: Effects of dietary tryptophan and two lighting regimens;Newberry;Poult. Sci.,1993
4. Akiba, Y., H. Othani, S. Saitoh, H. Ohkawara, H. Takakashi, M. Horiguchi, and K. Gotoh, 1988. L-Trp improves egg production rate and alleviates fatty liver in laying hens. Pages 1034– 1035 In: XVIII World's Poult. Congr. Proc.
5. Effect of protein on the tryptophan requirement of the growing chick and subsequent effects on lipid metabolism;Rogers;Poult. Sci.,1989