@article{CTT100801133,
  author = {Matvejeff, M. and Kazunori Nishio and Takahashi, R. and Lippmaa, M.},
  title = {Confined high-mobility electron gas at the Ruddlesden-Popper type heterointerfaces},
  journal = {Applied Physcs Letters},
  year = 2011,
}

@article{CTT100801573,
  author = {Kazunori Nishio and Matvejeff, M. and Takahashi, R. and Lippmaa, M. and Sumiya, M. and Yoshikawa, H. and Kobayashi, K. and Yamashita, Y.},
  title = {Delta-doped epitaxial La:SrTiO3 field-effect transistor},
  journal = {Applied Physcs Letters},
  year = 2011,
}