@article{jamet_1968, 
  title={Finite difference methods for the computation of the ''Poisson kernel" of elliptic operators}, 
  volume={22}, 
  DOI={10.1090/s0025-5718-1968-0250499-9}, 
  number={103}, 
  publisher={American Mathematical Society (AMS)}, 
  author={Jamet}, 
  year={1968}, 
  month={Sep}
  }