@misc{atsushi-a,
  title = {Ab-initio phonon calculation for KEr(PO3)4 / C222_1 (20) / materials id 554615},
  author = {Atsushi Togo},
  publisher = {NIMS},
  year = {},
  keywords = {Phonon, KEr(PO3)4, C222_1 (20)}
}