@book { ZurZukunftdesRaumes,
    title = "Zur Zukunft des Raumes",
    subtitle = "Perspektiven für Stadt – Region – Kultur – Landschaft",
    author = "Barbara {Zibell}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095328"
}