Erwan, E.; Alimon, A.; Sazili, A.; Yaakub, H. Effect of Varying Levels of Leucine and Energy on Performance and Carcass Characteristics of Broiler Chickens. Int. J. Poult. Sci. 2008, 7 (7), 696–699. https://doi.org/10.3923/ijps.2008.696.699.