@misc{indiciaedf25d9e73672,
  title = {Quantum fluctuations in the two-dimensional XY model: Variational approach.},
  author = {D Ariosa and H Beck},
  year = {1992},
  doi = {10.1103/physrevb.45.819},
  url = {https://pubmed.ncbi.nlm.nih.gov/10001124/},
  note = {Source identifier: 10001124}
}