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Optics Communications > 2012 > 285 > 24 > 4831-4839
IEEE Transactions on Microwave Theory and Techniques > 2010 > 58 > 11-2 > 3352 - 3358
Physics Letters A > 2008 > 372 > 23 > 4327-4332
e & i Elektrotechnik und Informationstechnik > 2003 > 120 > 3 > 91-97