@inproceedings{lai2021some,
title={Some extremal problems on graph theory},
author={Lai Chunhui},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20210821092927648300859},
booktitle={The 22nd Conference of the International Federation of Operational Research Societies},
year={2021},
}

Lai Chunhui. Some extremal problems on graph theory. 2021. In The 22nd Conference of the International Federation of Operational Research Societies. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20210821092927648300859.