@misc{indiciae67bd15cc1db6,
  title = {Normal Coördinates for the Geometry of Paths.},
  author = {O Veblen},
  year = {1922},
  doi = {10.1073/pnas.8.7.192},
  url = {https://pubmed.ncbi.nlm.nih.gov/16586875/},
  note = {Source identifier: 16586875}
}