@book { UMTSGrundlagenderWCDMAZellplanung,
    title = "UMTS: Grundlagen der W-CDMA Zellplanung",
    author = "Alexander {Beck}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832445355",
    url = "https://m.diplom.de/document/220134"
}