@inproceedings{alexander2017existence,
title={Existence of positive solutions to some nonlinear equations on locally finite graphs},
author={Alexander Grigor’yan, Yong Lin, and YunYan Yang},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220707121610514307558},
booktitle={Science China Mathematics},
volume={60},
pages={1311–1324},
year={2017},
}

Alexander Grigor’yan, Yong Lin, and YunYan Yang. Existence of positive solutions to some nonlinear equations on locally finite graphs. 2017. Vol. 60. In Science China Mathematics. pp.1311–1324. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220707121610514307558.