@book { DieWechselverpflichtungim19Jahrhundert,
    title = "Die Wechselverpflichtung im 19. Jahrhundert",
    author = "Judith {Freund}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02208-7",
    url = "https://www.peterlang.com/document/1054021"
}