@book { DieErziehungzurIndividualittundBrauchbarkeit,
    title = "Die Erziehung zur Individualität und Brauchbarkeit",
    author = "Paul {Krieger}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1081856"
}