@book { MarkenrechtlicheAbgrenzungsvereinbarungen,
    title = "Markenrechtliche Abgrenzungsvereinbarungen",
    author = "Dietmar {Althaus}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1135554"
}