@article{KernKrichel2007,
  author    = {Alexander Kern and Frank Krichel},
  title     = {Considerations about the lightning protection system of mains independent renewable energy hybrid-systems - practical experiences},
  journal   = {Journal of electrostatics. 60 (2004), H. 2-4},
  pages     = {257 -- 263},
  year      = {2007},
}