@book { BeschreibungsmodifrFinanzsysteme,
    title = "Beschreibungsmodi für Finanzsysteme",
    subtitle = "Wie beschreibt man Finanzsysteme?",
    author = "Holger {Papenfuss}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1087983"
}