@book { AnforderungenanUnternehmendurchdieAnhebungdesRenteneintrittsalters,
    title = "Anforderungen an Unternehmen durch die Anhebung des Renteneintrittsalters",
    author = "Thomas {Fräßdorf}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/297551"
}