@book { FinancialManagement,
    title = "Financial Management",
    author = "Burkhard {Kahre} and Rainer {Laier} and Ute {Vanini}",
    year = "2019",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221016"
}