@book{Babiel2013,
  author    = {Babiel, Gerhard},
  title     = {Bordnetze und Powermanagement},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-658-01558-9},
  pages     = {XII, 147},
  year      = {2013},
  language  = {de}
}
@book{Gustrau2013,
  author    = {Gustrau, Frank},
  title     = {Hochfrequenztechnik},
  publisher = {Fachbuchverlag Leipzig},
  address   = {M{\"u}nchen},
  isbn      = {978-3-446-43245-1},
  pages     = {328},
  year      = {2013},
  language  = {de}
}