@misc{indiciae71cab9724463,
  title = {Two-dimensional quantum spin Hamiltonians: Spectral properties.},
  author = {van Ede van der Pals P and P Gaspard},
  year = {1994},
  doi = {10.1103/physreve.49.79},
  url = {https://pubmed.ncbi.nlm.nih.gov/9961193/},
  note = {Source identifier: 9961193}
}