@misc{indiciae3e32217d7e43,
  title = {Universal noninteger "ground-state degeneracy" in critical quantum systems.},
  author = {I Affleck and AW Ludwig},
  year = {1991},
  doi = {10.1103/physrevlett.67.161},
  url = {https://pubmed.ncbi.nlm.nih.gov/10044510/},
  note = {Source identifier: 10044510}
}