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Electronics Letters > 2015 > 51 > 8 > 638 - 640
IEEE Microwave and Wireless Components Letters > 2010 > 20 > 3 > 148 - 150
IEEE Microwave and Wireless Components Letters > 2010 > 20 > 6 > 316 - 318
Electronics Letters > 2010 > 46 > 10 > 692 - 693