Selim N, Boulos N, Abdel-Khalek A, Shabaan M, Radwan N. Determination of Metabolizable Energy of Rich Unsaturated Fatty Acids Dry-Fat in Chicken Diets Using Chemical, Biological and Mathematical Methods. Int. J. Poult. Sci. 2013;12(11):666–675. doi:10.3923/ijps.2013.666.675