@book { ElectronicCommunicationsNetworks,
    title = "Electronic Communications Networks",
    author = "Niki {Huber}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832429461",
    url = "https://m.diplom.de/document/218670"
}