TY  - RPRT
TI  - Normal Coördinates for the Geometry of Paths.
AU  - O Veblen
PY  - 1922
DO  - 10.1073/pnas.8.7.192
UR  - https://pubmed.ncbi.nlm.nih.gov/16586875/
ID  - 16586875
ER  -