@book { ReformdesWelthandelssystems,
    title = "Reform des Welthandelssystems?",
    author = "Knut {Ipsen} and Ulrich R. {Haltern}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1080130"
}