@unpublished{WittkowskiWiehnJorzicketal.1999,
  author  = {Thomas Wittkowski and V. Wiehn and J{\"o}rg Jorzick and Kurt Jung and Burkard Hillebrands},
  title   = {Characterization of elastic properties of hard carbon and boron nitride Films using the Brillouin Light Scattering Technique},
  institution = {Fachbereich Physik},
  year    = {1999},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-9112},
}