@book { LernzielEuropa,
    title = "Lernziel Europa",
    author = "Florian T. {Furtak} and Bernd {Groß}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01992-6",
    url = "https://www.peterlang.com/document/1046958"
}