@book { PdagogischeVernunft,
    title = "Pädagogische Vernunft",
    author = "Dietmar {Langer}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02677-1",
    url = "https://www.peterlang.com/document/1046392"
}