@book { DersterreichischeHandel2004,
    title = "Der österreichische Handel 2004",
    author = "Peter {Voithofer} and Ernst {Gittenberger}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099588"
}