@book { BildungundSchlsselqualifikationen,
    title = "Bildung und Schlüsselqualifikationen",
    author = "Ursula {Konnertz} and Sibylle {Mühleisen}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05519-1",
    url = "https://www.peterlang.com/document/1049434"
}