@article{CTT100645090,
  author = {Kengo Oka and Tsukasa koyama and Tomoatsu Ozaki and Yuichi Shimakawa and Masaki Azuma and Shigeo Mori},
  title = {Polarization Rotation in the Monoclinic  Perovskite  BiCo1_xFex03},
  journal = {Angewandte Chemie-International Edition},
  year = 2012,
}