@book { 125JahreSozialistengesetz,
    title = "125 Jahre Sozialistengesetz",
    author = "Heidi {Beutin} and Wolfgang {Beutin} and Holger {Malterer} and Friedrich {Mülder}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097692"
}