@book { DieAbgrenzungvonMarken,
    title = "Die Abgrenzung von Marken",
    author = "Julia {Lorenz}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06697-5",
    url = "https://www.peterlang.com/document/1050103"
}