@book { BestAgersBestTargets,
    title = "Best Agers - Best Targets?",
    author = "Stephanie {Krancioch} and Gunnar {Arnold}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832496210",
    url = "https://m.diplom.de/document/224699"
}