@book { DieBundesfinanzenunddieEWGSteuerharmonisierung,
    title = "Die Bundesfinanzen und die EWG-Steuerharmonisierung",
    author = "Hans {Lippuner}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069175"
}