@book { WiekanngesundesAlternuntersttztwerden,
    title = "Wie kann gesundes Altern unterstützt werden",
    author = "Christine {Fischer}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832444358",
    url = "https://m.diplom.de/document/220042"
}