@book { InternationaleJointVenturesimMittelstand,
    title = "Internationale Joint Ventures im Mittelstand",
    author = "Tobias  {Köngerter}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640313761",
    url = "https://www.hausarbeiten.de/document/125862"
}