TY  - RPRT
TI  - On Monothetic Groups.
AU  - P R Halmos
AU  - H Samelson
PY  - 1942
DO  - 10.1073/pnas.28.6.254
UR  - https://pubmed.ncbi.nlm.nih.gov/16578045/
ID  - 16578045
ER  -