@incollection{Mertens2005,
  author    = {Mertens, K.},
  title     = {Kindgerechte Visualisierung von Photovoltaikertr{\"a}gen},
  series = {Symposium Photovoltaische Solarenergie},
  booktitle = {Symposium Photovoltaische Solarenergie},
  edition   = {20},
  publisher = {OTTI},
  address   = {Regensburg},
  isbn      = {978-3-934681-38-7},
  pages     = {520 -- 525},
  year      = {2005},
  language  = {de}
}