@article{CTT100653592,
  author = {Yutaka ITOH and Takato MACHI and Ikuya YAMADA and Masaki AZUMA and Mikio TAKANO},
  title = {Cu NQR and NMR Studiesof Optimally Doped Ca<sub>2</sub>xNaxCuO<sub>2</sub>Cl<sub>2</sub>},
  journal = {Journal of the Physical Society of Japan},
  year = 2013,
}

@article{CTT100668953,
  author = {Yutaka ITOH and Takato MACHI and Ikuya YAMADA and Masaki AZUMA and Mikio TAKANO},
  title = {Cu NQR and NMR Studies of Optimally Doped Ca<sub>2</sub>-<sub>x</sub>Na<sub>x</sub>CuO<sub>2</sub>Cl<sub>2</sub>},
  journal = {Journal of the Physical Society of Japan},
  year = 2013,
}