@book { WarumSchlermanchmalnichtlernen,
    title = "Warum Schüler manchmal nicht lernen",
    author = "Franziska {Dietz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101688"
}