@misc{atsushi-a,
  title = {Ab-initio phonon calculation for NaNbO3 / Pmc2_1 (26) / materials id 4681},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, NaNbO3, Pmc2_1 (26)}
}