@book { DieAbsatzplanungMethodenInstrumenteundProze,
    title = "Die Absatzplanung. Methoden, Instrumente und Prozeß",
    author = "Klaus {Mühlbäck}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638518352",
    url = "https://www.hausarbeiten.de/document/57340"
}