@misc{indiciae8e4c723679d4,
  title = {On Eigenfunction Expansions.},
  author = {F I Mautner},
  year = {1953},
  doi = {10.1073/pnas.39.1.49},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589235/},
  note = {Source identifier: 16589235}
}