@inproceedings{kefeng2007the,
title={The n-point functions for intersection numbers on moduli spaces of curves},
author={Kefeng Liu, and Hao Xu},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221111434056322641},
booktitle={arXiv preprint math/0701319},
year={2007},
}