@inproceedings{houde2009an,
  title={An analysis of the finite-difference method for one-dimensional KleinGordon equation on unbounded domain},
  author={Houde Han, and Zhiwen Zhang},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224211417844919603},
  booktitle={Applied Numerical Mathematics},
  volume={59},
  number={7},
  pages={1568-1583},
  year={2009},
}
             
            
                
Houde Han, and Zhiwen Zhang. An analysis of the finite-difference method for one-dimensional KleinGordon equation on unbounded domain. 2009. Vol. 59. In Applied Numerical Mathematics. pp.1568-1583. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224211417844919603.