@article{aftab_2009,  title={Response of broilers to practical diets with different metabolizable energy and balanced protein concentrations},  volume={11},  ISSN={1516-635X},  url={https://doi.org/10.1590/S1516-635X2009000300005},  DOI={10.1590/S1516-635X2009000300005},  number={3},  journal={Brazilian Journal of Poultry Science},  publisher={Fundação de Apoio à Ciência e Tecnologia Animal},  author={Aftab, U},  year={2009},  month={Jul},  pages={169–173} }