@article{wu_huang_shi_tan_2009,  title={Bioavailability comparison of free and esterified lutein for layer hens},  volume={11},  ISSN={1516-635X},  url={https://doi.org/10.1590/S1516-635X2009000200004},  DOI={10.1590/S1516-635X2009000200004},  number={2},  journal={Brazilian Journal of Poultry Science},  publisher={Fundação de Apoio à Ciência e Tecnologia Animal},  author={Wu, L and Huang, X and Shi, K and Tan, R},  year={2009},  month={Apr},  pages={95–98} }