@book { DerLandesbetrieb,
    title = "Der Landesbetrieb",
    subtitle = "Rechtliche Konzeption in Nordrhein-Westfalen",
    author = "Kristina {Schaloske}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1104978"
}