@book { BankbilanzierungnachHGBundIFRS,
    title = "Bankbilanzierung nach HGB und IFRS",
    author = "Hartmut {Bieg} and Gerd {Waschbusch}",
    year = "2017",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1220949"
}