TY  - RPRT
TI  - Groups Containing Less Than Twenty-Eight Non-Invariant Operators.
AU  - G A Miller
PY  - 1944
DO  - 10.1073/pnas.30.9.275
UR  - https://pubmed.ncbi.nlm.nih.gov/16588658/
ID  - 16588658
ER  -