@book { DieoffeneFlankederFreiheit,
    title = "Die offene Flanke der Freiheit",
    subtitle = "Studien zum Totalitarismus im 20. Jahrhundert",
    author = "Klaus {Hornung}",
    year = "2001",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092143"
}