El-Deek, A.A., K.M. Ghonem, Saffa M. Hamdy, M.A. Aser, Fahad M. Aljassas, and M.M. Osman. 2009. “Producing Single Cell Protein from Poultry Manure and Evaluation for Broiler Chickens Diets”. International Journal of Poultry Science 8 (11): 1062–1077. https://doi.org/10.3923/ijps.2009.1062.1077.