@book { DasVerbotdervergleichendenWerbungundArt30EWGVertrag,
    title = "Das Verbot der vergleichenden Werbung und Art. 30 EWG-Vertrag",
    author = "Gudula {Eckhardt} and  {Universität Münster}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1116451"
}