Selim , N. et al. 2013. Determination of Metabolizable Energy of Rich Unsaturated Fatty Acids Dry-Fat in Chicken Diets Using Chemical, Biological and Mathematical Methods. International Journal of Poultry Science. 12, 11 (Oct. 2013), 666–675. DOI:https://doi.org/10.3923/ijps.2013.666.675.