@book { RegelNormGesetz,
    title = "Regel, Norm, Gesetz",
    author = "Marco {Iorio} and Rainer {Reisenzein}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1136258"
}