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3. Nešić, A.: A printed array of symmetrical dipoles with a novel feeding congfiguration, p. 504–507 IEE Conf. Publ. 195
4. Gupta, K.C., Garg, R., and Bahl, I.J.: Microstrip lines and slot-lines, (Artech House, Inc., Dedham, Mass., USA p. 260–272