@inproceedings{artur2005simplicity,
  title={Simplicity of Lyapunov spectra: proof of the Zorich-Kontsevich conjecture},
  author={Artur Avila, and Marcelo Viana},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203350072017688},
  booktitle={Acta Mathematica},
  volume={198},
  number={1},
  pages={1-56},
  year={2005},
}
             
            
                
Artur Avila, and Marcelo Viana. Simplicity of Lyapunov spectra: proof of the Zorich-Kontsevich conjecture. 2005. Vol. 198. In Acta Mathematica. pp.1-56. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203350072017688.