Hernandez, F., M. D. Megias, J. Orengo, S. Martinez, M. J. Lopez, and J. Madrid. 2013. “Effect of Dietary Protein Level on Retention of Nutrients, Growth Performance, Litter Composition and NH3 Emission Using a Multi-Phase Feeding Programme in Broilers”. Spanish Journal of Agricultural Research 11 (3), 736-46. https://doi.org/10.5424/sjar/2013113-3597.