@book { VariantendesFhrungsMixfrstrategischeDivisionen,
    title = "Varianten des Führungs-Mix für strategische Divisionen",
    author = "Andreas {Greis}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088688"
}