@article{CTT100713843,
  author = {Takamitu Saitou and Akihisa Koga and Yamamoto, A.},
  title = {Metal-Insulator Transition in Optical Lattice System with Site-Dependent Interactions},
  journal = {Journal of Superconductivity and Novel Magnetism},
  year = 2013,
}

@article{CTT100713844,
  author = {Akihisa Koga and Takamitu Saitou and Yamamoto, Atsushi},
  title = {Mott Transitions in the Hubbard Model with Spatially Modulated Interactions},
  journal = {Journal of the Physical Society of Japan},
  year = 2013,
}