@book { UmweltschutzdurchBeweislastumkehr,
    title = "Umweltschutz durch Beweislastumkehr?",
    author = "Alexander {Freiherr Knigge}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092481"
}