@book { DieHerkunftderskeptischenPdagogik,
    title = "Die Herkunft der skeptischen Pädagogik",
    author = "Oskar {Dangl}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1091907"
}