@book { Mehrgenerationenwohnen,
    title = "Mehrgenerationenwohnen",
    author = "Elke {Schulte}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836617789",
    url = "https://m.diplom.de/document/226060"
}