@book { QuovadisdeutscheGewerkschaften,
    title = "Quo vadis, deutsche Gewerkschaften?",
    author = "Artur {Klosek}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03010-5",
    url = "https://www.peterlang.com/document/1047635"
}