@book { DieMarkenartikelpiraterie,
    title = "Die Marken(artikel)piraterie",
    author = "Katja S. {Schuhmacher}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098404"
}