@book { KundenanalyseimDiseaseManagement,
    title = "Kundenanalyse im Disease Management",
    subtitle = "Integriertes Krankheitsmanagement",
    author = "Carsten {Hoffmann}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832437466",
    url = "https://m.diplom.de/document/219429"
}