@inproceedings{masato2004physical,
  title={Physical measures for partially hyperbolic surface endomorphisms},
  author={Masato Tsujii},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203346324504662},
  booktitle={Acta Mathematica},
  volume={194},
  number={1},
  pages={37-132},
  year={2004},
}
             
            
                
Masato Tsujii. Physical measures for partially hyperbolic surface endomorphisms. 2004. Vol. 194. In Acta Mathematica. pp.37-132. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203346324504662.