@book { DergrenzberschreitendeBauvertraginderEuropischenUnion,
    title = "Der grenzüberschreitende Bauvertrag in der Europäischen Union",
    author = "Henrik {Jacobsen}",
    year = "2022",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b20339",
    url = "https://www.peterlang.com/document/1288881"
}