@book { ZurGrundlegungderErziehungswissenschaft,
    title = "Zur Grundlegung der Erziehungswissenschaft",
    author = "Horst {Sladek} and Wolfgang {Eichler}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103486"
}