@article{Luhmann2005,
  author    = {Luhmann, Hans-Jochen},
  title     = {Einen Gang runterschalten: Erd{\"o}lverbrauch},
  journal   = {Punkt.um},
  number    = {6},
  pages     = {2 -- 3},
  year      = {2005},
  language  = {de}
}