@techreport{BasianaMartinssonViketal.2004,
  author    = {Ariadna Farres Basiana and Hanna Martinsson and Brage Ofstad Vik and Sergiy Pereverzyev and Martin Purrucker and Klaus Erich Schmitz Abe and David Stiel and Uldis Strautins},
  title     = {Frequency Filtering in Telecommunications},
  institution = {Fachbereich Mathematik},
  year      = {2004}
}