Ivanov D.V., Kurkin V.I., Ivanova V.A., Dumbrava Z.F., Poddelsky I.N. Influence of solar X-ray fluxes to lowest observed frequency variations over HF sounding paths on February 7-8, 2010
V.A. Ivanova, N.M. Polekh, V.I. Kurkin, L.V. Chistyakova, M.D. Pezhemskaya, D.V. Ivanov, I.G. Brynko
, Z.F. Dumbrava, I.N. Poddelsky Investigation of large-scale travelling ionospheric disturbances during magnetic storms on 29.09.2007 and 15.02.2010