@misc{indiciae98d4ce7a6767,
  title = {On Interpolation to Harmonic Functions by Harmonic Polynomials.},
  author = {J L Walsh},
  year = {1932},
  doi = {10.1073/pnas.18.7.514},
  url = {https://pubmed.ncbi.nlm.nih.gov/16577461/},
  note = {Source identifier: 16577461}
}