@book { CaseManagementundPrimaryNursing,
    title = "Case Management und Primary Nursing",
    author = "Karin {Christian}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638060134",
    url = "https://www.hausarbeiten.de/document/92013"
}