@book { ControllingvonInstrumentendesNaturschutzesinFreiburgimBreisgau,
    title = "Controlling von Instrumenten des Naturschutzes in Freiburg im Breisgau",
    author = "Jens {Lüdeke}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832485788",
    url = "https://m.diplom.de/document/223774"
}