@article{CTT100725236,
  author = {Masayuki Toyoda and Kunihiko Yamauchi and Tamio Oguchi},
  title = {Ab initio study of magnetic coupling in CaCu3B4O12 (B=Ti, Ge, Zr, and Sn)},
  journal = {Physical Review B},
  year = 2013,
}

@inproceedings{CTT100725278,
  author = {Masayuki Toyoda and Kunihiko Yamauchi and Tamio Oguchi},
  title = {Magnetic coupling in A-site-ordered Perovskite CaCu3B4O12 (B=Ti, Ge, Zr, and Sn)},
  booktitle = {},
  year = 2013,
}

@inproceedings{CTT100725283,
  author = {Masayuki Toyoda and Kunihiko Yamauchi and Tamio Oguchi},
  title = {Ab initio study on magnetic coupling in A-site-ordered perovskite CaCu3B4O12 (B=Ti, Ge, Zr, and Sn)},
  booktitle = {},
  year = 2013,
}