@book { DiealterndeGesellschaftChancenundHerausforderungen,
    title = "Die alternde Gesellschaft - Chancen und Herausforderungen",
    author = "Simon {Busch}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656062165",
    url = "https://www.hausarbeiten.de/document/182401"
}