@book { LawandPracticeofPrivateHealthInsuranceandManagedCare,
    title = "Law and Practice of Private Health Insurance and Managed Care",
    author = "Christian {Funk}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832423216",
    url = "https://m.diplom.de/document/218136"
}