@misc{indiciae58ec69295c71,
  title = {Spinors in Projective Relativity.},
  author = {O Veblen},
  year = {1933},
  doi = {10.1073/pnas.19.11.979},
  url = {https://pubmed.ncbi.nlm.nih.gov/16577595/},
  note = {Source identifier: 16577595}
}