@inproceedings{yong2016a,
title={A Gradient Estimate for Positive Functions on Graphs},
author={Yong Lin, Shuang Liu, and Yunyan Yang},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220707121310152828557},
booktitle={The Journal of Geometric Analysis},
volume={27},
pages={1667–1679},
year={2016},
}

Yong Lin, Shuang Liu, and Yunyan Yang. A Gradient Estimate for Positive Functions on Graphs. 2016. Vol. 27. In The Journal of Geometric Analysis. pp.1667–1679. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220707121310152828557.