@misc{W1990516747,
  author = {Guifré Vidal and José I. Latorre and E. Rico and Alexei Kitaev},
  title = {Entanglement in Quantum Critical Phenomena},
  year = {2003},
  howpublished = {Physical Review Letters},
  doi = {https://doi.org/10.1103/physrevlett.90.227902}
}