@book { DerJuristRudolfIsay18861956,
    title = "Der Jurist Rudolf Isay (1886-1956)",
    author = "Felix {Gaul}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100138"
}