@article{CTT100631122,
  author = {W.  Zhang and N. Kumada and Y.  Yonesaki and T.  Takei and N. Kinomura and T.  Hayashi and M. Azuma and M. Takano},
  title = {Ferroelectric perovskite-type barium copper niobate: BaCu1/3Nb2/3O3},
  journal = {Solid State Chem.},
  year = 2006,
}