@article{ahmad_mahmud_hussain_javed_2019,  title={Morphometric Traits, Serum Chemistry and Antibody Response of Three Chicken Genotypes under Free-Range, Semi-Intensive and Intensive Housing Systems},  volume={21},  ISSN={1516-635X},  url={https://doi.org/10.1590/1806-9061-2018-0921},  DOI={10.1590/1806-9061-2018-0921},  number={1},  journal={Brazilian Journal of Poultry Science},  publisher={Fundação de Apoio à Ciência e Tecnologia Animal},  author={Ahmad, S and Mahmud, A and Hussain, J and Javed, K},  year={2019},  pages={eRBCA-2019-0921} }