@book { DerminimaleWeltstaat,
    title = "Der minimale Weltstaat",
    subtitle = "Zur politischen Interpretation der Schwerkraft",
    author = "Rainer {Schubert}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095614"
}