Tsopa, A. I.     The research program of millimetric radiowaves attenuation characteristics on perspective communication lines of Ukraine [Текст] / A.I. Tsopa, V.K. Ivanov, V.I. Leonidov та ін. // XIII International Conference "Modern Problems of Radio Engineering, Telecommunications and Computer Science TCSET'2016", February 23-26, 2016 Lviv-Slavske, Ukraine : Proceedings / Min. of Education and Science of Ukraine, Lviv Polytechnic Nat. Univ. — Lviv : Publishing House of Lviv Polytechnic, 2016. — P. 638-642.