@article{SchnappKostorz2002,
  author    = {Schnapp, Friedrich E. and Kostorz, Peter},
  title     = {Demographische Entwicklung, soziale Sicherungssysteme und Zuwanderung},
  series = {ZAR},
  journal   = {ZAR},
  pages     = {163 -- 171},
  year      = {2002},
  language  = {de}
}