@book { DeutschbrasilianischeWirtschaftsbeziehungen,
    title = "Deutsch-brasilianische Wirtschaftsbeziehungen",
    author = "Matthias {Müller}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832404543",
    url = "https://m.diplom.de/document/216420"
}