@book { CaseManagementinderAltenhilfe,
    title = "Case Management in der Altenhilfe",
    author = "Andrea {Schulz}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836625005",
    url = "https://m.diplom.de/document/226487"
}