@book { DieEUKommissare,
    title = "Die EU-Kommissare",
    author = "Pia {Braukmann}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05644-0",
    url = "https://www.peterlang.com/document/1049368"
}