@book { Produktionscontrolling,
    title = "Produktionscontrolling",
    subtitle = "Strategie, Investition, Kosten und Kennzahlen",
    author = "Axel Georg {Schwellnuß}",
    year = "2021",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1219129"
}