@book { GymnasialeBildungspolitikinBadenWrttemberg,
    title = "Gymnasiale Bildungspolitik in Baden-Württemberg",
    subtitle = "Theorie und Wirklichkeit (1963-2003)",
    author = "Dieter {Lang}",
    year = "2004",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098039"
}