TY  - RPRT
TI  - Universal noninteger "ground-state degeneracy" in critical quantum systems.
AU  - I Affleck
AU  - AW Ludwig
PY  - 1991
DO  - 10.1103/physrevlett.67.161
UR  - https://pubmed.ncbi.nlm.nih.gov/10044510/
ID  - 10044510
ER  -