TY  - RPRT
TI  - ON GROUPS DEFINED BY A = 1, B AB = A, B = A.
AU  - M J Weiss
PY  - 1929
DO  - 10.1073/pnas.15.12.903
UR  - https://pubmed.ncbi.nlm.nih.gov/16587529/
ID  - 16587529
ER  -