@inproceedings{alexander2015cohomology,
title={COHOMOLOGY OF DIGRAPHS AND (UNDIRECTED) GRAPHS},
author={ALEXANDER GRIGOR’YAN, Yong Lin, YURI MURANOV, and Shing-Tung Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180403143232226142012},
booktitle={ASIAN JOURNAL OF MATHEMATICS},
pages={887-932},
year={2015},
}
ALEXANDER GRIGOR’YAN, Yong Lin, YURI MURANOV, and Shing-Tung Yau. COHOMOLOGY OF DIGRAPHS AND (UNDIRECTED) GRAPHS. 2015. In ASIAN JOURNAL OF MATHEMATICS. pp.887-932. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20180403143232226142012.