@book { GrundlagenderKostenrechnung,
    title = "Grundlagen der Kostenrechnung",
    author = "Sven {Fischbach} and Anja {Fischbach}",
    year = "2022",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1219164"
}