@misc{indiciaec4f798c8750a,
  title = {Finite-difference-pseudopotential method: Electronic structure calculations without a basis.},
  author = {JR Chelikowsky and N Troullier and Y Saad},
  year = {1994},
  doi = {10.1103/physrevlett.72.1240},
  url = {https://pubmed.ncbi.nlm.nih.gov/10056658/},
  note = {Source identifier: 10056658}
}