@misc{indiciaeb9624b0a7cb2,
  title = {The Dirac Equation in Projective Relativity.},
  author = {A H Taub and O Veblen and J von Neumann},
  year = {1934},
  doi = {10.1073/pnas.20.6.383},
  url = {https://pubmed.ncbi.nlm.nih.gov/16587909/},
  note = {Source identifier: 16587909}
}