Boncho G. Bonev and  Kliment N. Angelov and  Emil S. Altimirski,  Study on Radio Link Availability in Millimeter Wave Range.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 1458 - 1461
    [viewed 26 January 2020]. Available from: https://publications.waset.org/pdf/12827.