@book { DerthematischeEinstieg,
    title = "Der thematische Einstieg",
    author = "Michael {Szurawitzki}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01112-8",
    url = "https://www.peterlang.com/document/1054088"
}