Olanrewaju , H.; Miller, W.; Maslin, W.; Collier, S.; Purswell, J.; Branton, S. Effect of Varying Light Intensity on Welfare Indices of Broiler Chickens Grown to Heavy Weights. Int. J. Poult. Sci. 2011, 10 (7), 590–596. https://doi.org/10.3923/ijps.2011.590.596.