@article{CTT100631999,
  author = {Masaki Azuma and Wei-tin Chen and Hayato  seki and Michal  Czapski and Smirnova olga and Kengo oka and Masaichiro Mizumaki and Tetsu Watanuki and Naoki Ishimatsu and Naomi Kawamura and Shintaro Ishiwata and Matthew G. Tucker and Yuichi Shimakawa and J. Paul Attfield},
  title = {Colossal negative thermal expansion in BiNiO3 induced by intermetallic charge transfer},
  journal = {NATURE COMMUNICATIONS},
  year = 2011,
}

@article{CTT100634976,
  author = {M Azuma and Masaaki Matsuda and S Olga and Y Kusano and Y Shimakawa and N Kumada and Nozomi Onishi and M  Tokunaga},
  title = {Frustrated S=3/2 honeycomb antiferromagnet Bi3Mn4O12(NO3)},
  journal = {Journal of Physics: Conference Series},
  year = 2011,
}