@article{CTT100711340,
  author = {Hajime Yamamoto and Takumi Kihara and Kengo Oka and Tokunaga Masashi and Ko Mibu and Masaki Azuma},
  title = {Spin Structure Change in Co-Substituted BiFeO<sub>3 </sub>},
  journal = {Journal of the Physical Society of Japan},
  year = 2016,
}

@article{CTT100667939,
  author = {Romain  Gautier and Kengo Oka and Takumi Kihara and Nitesh Kumar and Athinarayanan Sundaresan and M  Tokunaga and Masaki Azuma and Kenneth R. Poeppelmeier},
  title = {Spin Frustration from cis-Edge or -Corner Sharing Metal-Centered Octahedra},
  journal = {Journal of the american chemical society},
  year = 2013,
}