@book { DeutschesRechtEineEinfhrung,
    title = "Deutsches Recht. Eine Einführung",
    author = "Gilbert {Gornig} and Hans-Detlef {Horn}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-07122-1",
    url = "https://www.peterlang.com/document/1050752"
}