2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves, Kharkiv, Ukraine. IEEE: pp. 512-516; ISBN 978-1-4799-1068-7
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Treiber CD, Salzer M, Breuss M, Ushakova L, Lauwers M, Edelman N, Keays DA