@book { KonjunkturinDeutschland,
    title = "Konjunktur in Deutschland",
    author = "Gregor {Nalepa}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640759798",
    url = "https://www.hausarbeiten.de/document/161513"
}