TY JOUR TI Influence of the β solar wind parameter on statistical characteristics of the Ap index in the solar activity cycle KW ULF wave propagation KW numerical simulation KW ionosphere JO Solnechno-Zemnaya Fizika AU Zotov, O.D. AU Klain, B.I. AU Kurazhkovskaya, N.A. PY 2019 IS 5 PB INFRA-M Academic Publishing LLC.