@book { WertundrisikoorientiertesControlling,
    title = "Wert- und risikoorientiertes Controlling",
    author = "Dirk {Beyer} and Sandra {Kirchner-Khairy}",
    year = "2024",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1459352"
}