@book { DieRegionHannover,
    title = "Die Region Hannover",
    subtitle = "Regionale Kooperation vor dem Hintergrund einer institutionalisierten Gebietskörperschaft",
    author = "Jens {Wassermann}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832498610",
    url = "https://m.diplom.de/document/224978"
}