@book { UnionsrechtlicheSachaufklrungdelegeferenda,
    title = "Unionsrechtliche Sachaufklärung de lege ferenda",
    author = "Rick {Sprotte}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17814",
    url = "https://www.peterlang.com/document/1063563"
}