@inproceedings{lai2021an,
title={An old problem of Erd\H os: a graph without two cycles of the same length},
author={Lai Chunhui},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20211013142626071808877},
booktitle={arXiv:2110.04696},
year={2021},
}

Lai Chunhui. An old problem of Erd\H os: a graph without two cycles of the same length. 2021. In arXiv:2110.04696. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20211013142626071808877.