@misc{atsushi-a,
  title = {Ab-initio phonon calculation for Ca4Nb2O9 / P2_1/c (14) / materials id 31016},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, Ca4Nb2O9, P2_1/c (14)}
}