@book { ThinkinginSystems,
    title = "Thinking in Systems",
    subtitle = "Wie komplexe Systeme funktionieren",
    author = "Donella H. {Meadows} and Diana {Wright} and Hartmut {Bossel} and Karen {Bossel}",
    year = "2026",
    publisher = "C.H.Beck",
    address = ", Deutschland",
    url = "https://vahlen.openpublishing.com/document/1738490"
}