@article{K{\"o}hlerSieberWalz2012,
  author    = {K{\"o}hler, Dennis and Sieber, Raphael and Walz, Manfred},
  title     = {Licht planen},
  series = {Stadt + Gr{\"u}n : das Gartenamt ; Organ der st{\"a}ndigen Konferenz der Gartenbauamtsleiter beim Deutschen St{\"a}dtetag},
  volume    = {61 (2012)},
  number    = {11},
  issn      = {0016-4739},
  pages     = {3},
  year      = {2012},
  language  = {de}
}
@article{K{\"o}hler2012,
  author    = {K{\"o}hler, Dennis},
  title     = {Sichernd? Normgerecht? Verpflichtend?},
  series = {Licht},
  volume    = {64 (2012)},
  number    = {9},
  issn      = {0024-2861},
  pages     = {5},
  year      = {2012},
  language  = {de}
}
@article{K{\"o}hler2012,
  author    = {K{\"o}hler, Dennis},
  title     = {Lichtmasterplan},
  series = {Professional lighting design},
  number    = {82},
  pages     = {5},
  year      = {2012},
  language  = {de}
}