Vladimir Veremey,  Analysis and Design of Dual-Polarization Antennas for Wireless Communication Systems.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2019, vol. 148(4). 235 - 238
    [viewed 20 October 2019]. Available from: https://publications.waset.org/pdf/10010259.