@article{CTT100779898,
  author = {Takumi Nishikubo and Yuki Sakai and Kengo Oka and Masaichiro Mizumaki and Tetsu Watanuki and Akihiko Machida and Naoyuki Maejima and Shigenori Ueda and Takashi Mizokawa and Masaki Azuma},
  title = {Optimized negative thermal expansion induced by gradual intermetallic charge transfer in Bi<sub>1</sub><sub>-</sub><sub>x</sub>Sb<sub>x</sub>NiO<sub>3</sub>},
  journal = {Applied physics express},
  year = 2018,
}

@article{CTT100760072,
  author = {M. Azuma and Y. Sakai and T. Nishikubo and M. Mizumaki and T. Watanuki and T. Mizokawa and K. Oka and H. Hojo and M. Naka},
  title = {Systematic charge distribution changes in Bi- and Pb-3d transition metal perovskites},
  journal = {Dalton Transactions},
  year = 2018,
}