@book { DieeuropischeRegulierungaudiovisuellerMediendienste,
    title = "Die europäische Regulierung audiovisueller Mediendienste ",
    author = "Sarah {Hartmann}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15311",
    url = "https://www.peterlang.com/document/1063194"
}