@misc{indiciae1c397f700197,
  title = {Edge states in antiferromagnetic quantum spin chains.},
  author = {TK Ng},
  year = {1994},
  doi = {10.1103/physrevb.50.555},
  url = {https://pubmed.ncbi.nlm.nih.gov/9974577/},
  note = {Source identifier: 9974577}
}