@inproceedings{sergio2008proof,
  title={PROOF OF THE ANGULAR MOMENTUM-MASS INEQUALITY FOR AXISYMMETRIC BLACK HOLES},
  author={Sergio Dain},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160909110429268882720},
  booktitle={Journal of Differential Geometry},
  volume={79},
  number={1},
  pages={33-67},
  year={2008},
}
             
            
                
Sergio Dain. PROOF OF THE ANGULAR MOMENTUM-MASS INEQUALITY FOR AXISYMMETRIC BLACK HOLES. 2008. Vol. 79. In Journal of Differential Geometry. pp.33-67. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160909110429268882720.