@book { DasGartenstadtmodell,
    title = "Das Gartenstadtmodell",
    subtitle = "100 Jahre Utopie versus Realität",
    author = "Ernst {Primas}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832467296",
    url = "https://m.diplom.de/document/222103"
}