@article{yao_liu_han_2008,  title={Growth and photosynthetic responses of Picea asperata seedlings to enhanced ultraviolet-B and to nitrogen supply},  volume={20},  ISSN={1677-0420},  url={https://doi.org/10.1590/S1677-04202008000100002},  DOI={10.1590/S1677-04202008000100002},  number={1},  journal={Brazilian Journal of Plant Physiology},  publisher={Brazilian Journal of Plant Physiology},  author={Yao, Xiaoqin and Liu, Qing and Han, Chao},  year={2008},  month={Jan},  pages={11–18} }