@book { DoublerAmplifierBuildingBlockforCWRadar,
    title = "Doubler/Amplifier Building Block for CW-Radar",
    author = "Manar {Bakro}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842822313",
    url = "https://m.diplom.de/document/228680"
}