TY  - RPRT
TI  - EXAMPLES FOR DIFFERENTIABLE GROUP ACTIONS ON SPHERES.
AU  - D Montgomery
AU  - H Samelson
PY  - 1961
DO  - 10.1073/pnas.47.8.1202
UR  - https://pubmed.ncbi.nlm.nih.gov/16590871/
ID  - 16590871
ER  -