@inproceedings{kefeng1995modular,
title={Modular invariance and characteristic numbers},
author={Kefeng Liu},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221111306061266617},
booktitle={Communications in mathematical physics},
volume={174},
number={1},
pages={29-42},
year={1995},
}

Kefeng Liu. Modular invariance and characteristic numbers. 1995. Vol. 174. In Communications in mathematical physics. pp.29-42. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221111306061266617.