1. A. Sommerfeld, Electrodynamics: Lectures on Theoretical Physics, vol. 3 (Academic Press, Cambridge, 2013)
2. J.A. Stratton, Electromagnetic Theory (McGraw-Hill Book Company, New York, 1941)
3. C. Hebedeon, C. Munteanu, Numerical modeling of microstrip patch antenna. ACTA Electrotehnica 51(4), 281–284 (2010)
4. H.Z. Zhang et al., Monopole to slot antenna coupling analysis for resonant and higher order harmonics via UTD, in 2013 IEEE Antenna and Propagation Society International Symposium(APSURS), (2013), pp.1068–1069
5. A. Grebennikov et al., Broadband RF and Microwave Amplifiers (CRC Press, Taylor and Francis group, Boca Raton, 2016)