@misc{indiciaee9c67766a79f,
  title = {The Riemann Geometry and Its Generalization.},
  author = {L P Eisenhart and O Veblen},
  year = {1922},
  doi = {10.1073/pnas.8.2.19},
  url = {https://pubmed.ncbi.nlm.nih.gov/16586852/},
  note = {Source identifier: 16586852}
}