@book { GelddefinitionundGeldschpfung,
    title = "Gelddefinition und Geldschöpfung",
    author = "Wulf Johannes {Rohland}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1070729"
}