@inproceedings{kefeng2007a,
title={A simple proof of Mirzakhanis recursion formula of WeilPetersson volumes},
author={Kefeng Liu, and Hao Xu},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221111436808715642},
booktitle={arXiv preprint arXiv:0705.2086},
year={2007},
}