@book { IndustriestudieFrankfurtamMain2013,
    title = "Industriestudie Frankfurt am Main 2013",
    author = "Peter {Lindner} and Stefan {Ouma} and Max {Klöppinger} and Marc {Boeckler}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04704-2",
    url = "https://www.peterlang.com/document/1048797"
}