1. Cherry, J. A., 1979. Adaptation in food intake after changes in dietary energy. Pages 13–19 in: Proceedings of the XIVth Poultry Science Symposium. K. N. Boornant and B. M. Freeman, ed. British Poultry Science, Ltd., Edinburgh, Scotland, UK.
2. D'Alfonso, T. H., 1994. Quality Control of Nutritional and Environmental Factors in Laying Hen Production. Ph.D. Dissertation Agricultural/Biological Engineering and Operations Research. Pennsylvania State University. University Park, PA.
3. Duncan, M. S., 1986. How to deal with ingredient variability. Proceedings of the American Feed Industry Association Nutrition Symposium. The American Feed Industry Association, Arlington, VA.
4. Nutrient Requirements of Poultry;National Research Council,1984
5. Effect of temperature and dietary energy on layer performance;Peguri;Poultry Sci.,1991