@article{hao_chang_wang_chen_huang_chen_2021,  title={Dietary Supplementation with Ferula Improves Productive Performance, Serum Levels of Reproductive Hormones, and Reproductive Gene Expression in Aged Laying Hens},  volume={23},  ISSN={1516-635X},  url={https://doi.org/10.1590/1806-9061-2020-1319},  DOI={10.1590/1806-9061-2020-1319},  number={4},  journal={Brazilian Journal of Poultry Science},  publisher={Fundação de Apoio à Ciência e Tecnologia Animal},  author={Hao, E and Chang, LY and Wang, DH and Chen, YF and Huang, RI and Chen, H},  year={2021},  pages={eRBCA-2020-1319} }