@book{Raatschen1986,
  author    = {Raatschen, Hans-J{\"u}rgen},
  title     = {Ein Bicharakteristikenverfahren zur Berechnung von Spannungswellen in krummlinig berandeten Scheiben},
  publisher = {RWTH Aachen},
  address   = {Aachen},
  pages     = {110 S. : Ill., graph. Darst.},
  year      = {1986},
  language  = {de}
}
@book{GrundmannHallmannSchaefer1983,
  author    = {Grundmann, Reinhard and Hallmann, Willi and Sch{\"a}fer, Horst},
  title     = {Entwicklung eines einfachen Windmessgeraetes fuer Entwicklungslaender},
  publisher = {FIZ Energie, Physik, Mathematik},
  address   = {Eggenstein-Leopoldshafen},
  pages     = {137 S.},
  year      = {1983},
  language  = {de}
}