@article{GaidaHochstadtPieler2008,
  author    = {Gaida, Dietmar and Hochstadt, Stefan and Pieler, Markus},
  title     = {Demografie im Raum},
  series = {Planerin},
  number    = {1},
  issn      = {0936-9465},
  pages     = {2},
  year      = {2008},
  language  = {de}
}
@article{HochstadtPielerGaida2008,
  author    = {Hochstadt, Stefan and Pieler, Markus and Gaida, Dietmar},
  title     = {Jung und Alt bunt gemischt},
  series = {Die Rheinische Straßen-Zeitung},
  volume    = {1 (2008)},
  number    = {1},
  pages     = {1},
  year      = {2008},
  language  = {de}
}