@misc{indiciae21b9197cead9,
  title = {Projective Normal Coördinates for the Geometry of Paths.},
  author = {O Veblen and J M Thomas},
  year = {1925},
  doi = {10.1073/pnas.11.4.204},
  url = {https://pubmed.ncbi.nlm.nih.gov/16576871/},
  note = {Source identifier: 16576871}
}