@book { DieGeltungvonTarifvertrgeninFrankreich,
    title = "Die Geltung von Tarifverträgen in Frankreich",
    author = "Marthe {Schwarzbach}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02850-8",
    url = "https://www.peterlang.com/document/1047512"
}