@article{PhysRevB.83.220103,
  publisher = {American Physical Society},
  author = {Peng, Qing and Cohen, R. E.},
  month = {Jun},
  url = {http://link.aps.org/doi/10.1103/PhysRevB.83.220103},
  year = {2011},
  pages = {220103},
  title = {Origin of pyroelectricity in LiNbO${}_{3}$},
  volume = {83},
  journal = {Phys. Rev. B},
  doi = {10.1103/PhysRevB.83.220103},
  numpages = {4},
  issue = {22}
}