@book { MATransaktionen,
    title = "M&A-Transaktionen",
    author = "Christina {Hagen}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656526001",
    url = "https://www.hausarbeiten.de/document/263821"
}