@book { Strategischdenkenerfolgreichfhren,
    title = "Strategisch denken - erfolgreich führen",
    author = "Christian {Loffing} and Ivo {Krizek} and Dina {Loffing} and Michael {Horst}",
    year = "2012",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403776"
}