@misc{atsushi-a,
  title = {Ab-initio phonon calculation for K4Ge9O20 / I4_1/a (88) / materials id 30962},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, K4Ge9O20, I4_1/a (88)}
}