@book { DieNPD,
    title = "Die NPD",
    subtitle = "Entwicklung, Ideologie und Struktur",
    author = "Uwe {Hoffmann}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088883"
}