@book { KryptowhrungenimSteuerrecht,
    title = "Kryptowährungen im Steuerrecht",
    author = "Cecilie Elisabeth J. {Madsen}",
    year = "2023",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b20320",
    url = "https://www.peterlang.com/document/1288907"
}