@book { DieLernendeRegion,
    title = "Die Lernende Region",
    subtitle = "Theorie und Strategie",
    author = "Michael {De Luigi}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832425470",
    url = "https://m.diplom.de/document/218340"
}