@book { DiemarxistischleninistischeStaatsundRechtstheorieKarlPolaks,
    title = "Die marxistisch-leninistische Staats- und Rechtstheorie Karl Polaks",
    author = "Nils {Reichhelm}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095352"
}