@inproceedings{martin2014a,
title={A sharp comparison theorem for compact manifolds with mean convex boundary},
author={Martin Man-chun Li},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020105709533456543},
booktitle={The Journal of Geometric Analysis},
volume={24},
number={3},
pages={1490-1496},
year={2014},
}

Martin Man-chun Li. A sharp comparison theorem for compact manifolds with mean convex boundary. 2014. Vol. 24. In The Journal of Geometric Analysis. pp.1490-1496. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020105709533456543.