Salikhov, N., и G. Pak. «IONOSPHERIC EFFECTS OF SOLAR FLARES AND EARTHQUAKE ACCORDING TO DOPPLER FREQUENCY SHIFT ON AN INCLINED RADIO PATH». Известия НАН РК. Серия физико-математическая, вып. 3, июнь 2020 г., сс. 108-17, http://189185.vm7pq.group/physics-mathematics/article/view/470.