@misc{indiciaeb8503b59ca98,
  title = {Conformal Relativity.},
  author = {R L Ingraham},
  year = {1952},
  doi = {10.1073/pnas.38.10.921},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589201/},
  note = {Source identifier: 16589201}
}