@book { Bankrecht,
    title = "Bankrecht",
    author = "Hans-Michael {Krepold} and Sandra {Fischbeck} and Christian {Kropf} and Stefan {Werner}",
    year = "2018",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221001"
}