@book { DieregionaleGesundheitsversorgunginDeutschland,
    title = "Die regionale Gesundheitsversorgung in Deutschland",
    subtitle = "Eine Erkundungsstudie",
    author = "Jens {Gabriel}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836613439",
    url = "https://m.diplom.de/document/225814"
}