@book { DieGleichheitinderUnterschiedenheit,
    title = "Die Gleichheit in der Unterschiedenheit",
    author = "Birgitt {Mayer-König}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1084772"
}