@phdthesis{
  author = {J. Bitzer},
  year = {2002},
  month = {Sep},
  title = {Mehrkanalige Ger\"{a}uschunterdr\"{u}ckungssysteme - eine vergleichende Analyse},
  school = {University of Bremen, Germany},
  publisher = {Shaker Verlag},
  ISBN = {978-3-8322-0439-6},
  address={Aachen, Germany}
}