@inproceedings{shing-tung1999spanning,
title={Spanning trees in subgraphs of lattices},
author={Shing-Tung Yau, and ST Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224204652410716204},
booktitle={Contemporary Mathematics},
volume={245},
pages={201-220},
year={1999},
}