@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}hlerSieber2011,
  author    = {K{\"o}hler, Dennis and Sieber, Raphael},
  title     = {Der Stadtraum zur Kunstlichtzeit},
  series = {Professional lighting design},
  number    = {79},
  pages     = {5},
  year      = {2011},
  language  = {de}
}