@inproceedings{zuoqiang2017convergence,
  title={Convergence of the Point Integral method for Poisson Equation on Point Cloud},
  author={Zuoqiang Shi, and Jian Sun},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170925163805513586820},
  booktitle={Research in the Mathematical Sciences},
  volume={4},
  number={1},
  year={2017},
}
             
            
                
Zuoqiang Shi, and Jian Sun. Convergence of the Point Integral method for Poisson Equation on Point Cloud. 2017. Vol. 4. In Research in the Mathematical Sciences. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170925163805513586820.