@book { MglichkeitenundGrenzendesB2BMarketing,
    title = "Möglichkeiten und Grenzen des B2B-Marketing",
    author = "Andreas {Brückle}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832449261",
    url = "https://m.diplom.de/document/220493"
}