@article{Heller1998,
  author    = {Heller, Wilfried},
  title     = {The non agricultural economy of rural post-socialist romania : insights ans perceptions of national, regional ans local institutions and experts},
  year      = {1998},
  language  = {en}
}
@misc{BeckerHeller1998,
  author    = {Becker, J{\"o}rg and Heller, Wilfried},
  title     = {Die nichtdeutsche Bev{\"o}lkerung in Ostdeutschland : eine Studie zur r{\"a}umlichen Segregation und Wohnsituation. Projektleitung: Wilfried Heller},
  series = {Potsdamer geographische Forschungen},
  volume    = {15},
  journal   = {Potsdamer geographische Forschungen},
  publisher = {Inst. f{\"u}r Geographie und Geo{\"o}kologie},
  address   = {Potsdam},
  issn      = {0940-9688},
  pages     = {160 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}
@article{Heller1998,
  author    = {Heller, Wilfried},
  title     = {Transformation : current importance of the subject, open questions and research deficits},
  year      = {1998},
  language  = {en}
}
@article{Heller1998,
  author    = {Heller, Wilfried},
  title     = {Experiences and assessments of the transformation from private households point of view},
  year      = {1998},
  language  = {en}
}
@article{Heller1998,
  author    = {Heller, Wilfried},
  title     = {Introduction : migration, socio-economic transformation and perspectives of regional development in the rural areas of romania ; report on a German - Romanian reseach project},
  year      = {1998},
  language  = {en}
}
@article{Heller1998,
  author    = {Heller, Wilfried},
  title     = {Migration, socio-economic transformation and perspectives of regional development},
  year      = {1998},
  language  = {en}
}
@misc{Heller1998,
  author    = {Heller, Wilfried},
  title     = {Kleger, H., Metropolitane Transformation durch urbane Regime, Berlin-Brandenburg auf dem Weg zu regionaler Handlungsf{\"a}higkeit; Amsterdam, Verl. Fakultas, 1996},
  year      = {1998},
  language  = {de}
}
@article{Heller1998,
  author    = {Heller, Wilfried},
  title     = {Binnenmigration und Probleme des l{\"a}ndlichen Raums im postsozialistischen Rum{\"a}nien},
  year      = {1998},
  language  = {de}
}