@misc{UnkelbachBeckerKoehleretal.1973,
  author    = {K. H. Unkelbach and Charles R. Becker and H. K{\"o}hler and A. V. Middendorff},
  title     = {Optical Phonons of Bi\(_2\)Te\(_3\)},
  institution = {Physikalisches Institut},
  type      = {review},
  year        = {1973},
}