@book { SatellitennavigationssystemeGPSundGALILEOKoexistenzoderdochKonkurrenz,
    title = "Satellitennavigationssysteme: GPS und GALILEO – Koexistenz oder doch Konkurrenz?",
    author = "Reinhard {Feigl}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/297507"
}