@misc{indiciaeb8e58348d366,
  title = {LINEAR TRANSFORMATIONS IN HILBERT SPACE: II. ANALYTICAL ASPECTS.},
  author = {M H Stone},
  year = {1929},
  doi = {10.1073/pnas.15.5.423},
  url = {https://pubmed.ncbi.nlm.nih.gov/16577194/},
  note = {Source identifier: 16577194}
}