@book { EuropischesVerbrauchervertragsrechtimBGB,
    title = "Europäisches Verbrauchervertragsrecht im BGB",
    author = "Janine {Engelhardt}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093699"
}