@book { DasffentlichrechtlicheBankensystem,
    title = "Das öffentlich-rechtliche Bankensystem",
    author = "Andreas {Schäfer}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05794-2",
    url = "https://www.peterlang.com/document/1049390"
}