@book { KonvergenzundStrukturwandelinOstdeutschland,
    title = "Konvergenz und Strukturwandel in Ostdeutschland",
    author = "Mathias F. {Brinker}",
    year = "2004",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638269612",
    url = "https://www.hausarbeiten.de/document/23968"
}