Nalapko, O., Sova, O., Shyshatskyi, A., Hasan, A., Velychko, V., Trotsko, O. , Merkotan, D., Protas, N., Lazuta, R. and Yakovchuk О. 2021. Analysis of mathematical models of mobility of communication systems of special purpose radio communication systems. Technology audit and production reserves. 4, 2(60) (Jul. 2021), 39–44. DOI:https://doi.org/10.15587/2706-5448.2021.237433.