@article{DielmannMehlkopfCudina2004,
  author    = {Dielmann, Klaus-Peter and Mehlkopf, Marcus and Cudina, Boris},
  title     = {Erfahrungen mit der Software Risa-Gen},
  series = {BWK : das Energie-Fachmagazin},
  volume    = {56},
  journal   = {BWK : das Energie-Fachmagazin},
  number    = {3},
  isbn      = {0006-9612},
  issn      = {1618-193X},
  pages     = {24 -- 25},
  year      = {2004},
  language  = {de}
}
@book{EngelnMuellgesSchaeferTrippler2004,
  author    = {Engeln-M{\"u}llges, Gisela and Sch{\"a}fer, Wolfgang and Trippler, Gisela},
  title     = {Kompaktkurs Ingenieurmathematik mit Wahrscheinlichkeitsrechnung und Statistik. - 3., neu bearb. und erw. Aufl.},
  publisher = {Fachbuchverl. Leipzig im Carl-Hanser-Verl.},
  address   = {M{\"u}nchen [u.a.]},
  isbn      = {3-446-22864-0},
  pages     = {394 S. : graph. Darst.},
  year      = {2004},
  language  = {de}
}
@book{EngelnMuellges2004,
  author    = {Engeln-M{\"u}llges, Gisela},
  title     = {Numerische Mathematik und Statistik : NUMAS ; multimediales Lehr- und Lernsystem zur Numerischen Mathematik und Statistik ; Abschlussbericht ; Gemeinschaftsprojekt},
  publisher = {Projektb{\"u}ro NUMAS, FH [u.a.]},
  address   = {Aachen},
  year      = {2004},
  language  = {de}
}
@article{KernKrichel2004,
  author    = {Kern, Alexander and Krichel, Frank},
  title     = {Considerations about the lightning protection system of mains independent renewable energy hybrid-systems - practical experiences},
  series = {Journal of electrostatics. 60 (2004), H. 2-4},
  journal   = {Journal of electrostatics. 60 (2004), H. 2-4},
  isbn      = {0304-3886},
  pages     = {257 -- 263},
  year      = {2004},
  language  = {en}
}
@article{ZischankHeidlerWiesingeretal.2004,
  author    = {Zischank, Wolfgang J. and Heidler, Fridolin and Wiesinger, J. and Metwally, I. and Kern, Alexander and Seevers, M.},
  title     = {Laboratory simulation of direct lightning strokes to a modeled building : measurement of magnetic fields and included voltages},
  series = {Journal of electrostatics. 60 (2004), H. 2 - 4},
  journal   = {Journal of electrostatics. 60 (2004), H. 2 - 4},
  isbn      = {0304-3886},
  pages     = {223 -- 232},
  year      = {2004},
  language  = {en}
}
@book{Kern2004,
  author    = {Kern, Alexander},
  title     = {Blitz- und {\"U}berspannungsschutz f{\"u}r Anlagen der regenerativen Energietechnik},
  publisher = {Fachhochschule Aachen, Abt. J{\"u}lich},
  address   = {Aachen},
  year      = {2004},
  language  = {de}
}