TY  - RPRT
TI  - The Riemann Geometry and Its Generalization.
AU  - L P Eisenhart
AU  - O Veblen
PY  - 1922
DO  - 10.1073/pnas.8.2.19
UR  - https://pubmed.ncbi.nlm.nih.gov/16586852/
ID  - 16586852
ER  -