@book { DieEssentialFacilitiesDoktrinundderMissbrauchsfallMicrosoft,
    title = "Die Essential Facilities Doktrin und der Missbrauchsfall Microsoft",
    author = "Markus {Krebes}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640924288",
    url = "https://www.hausarbeiten.de/document/172500"
}