1.Hồng PTT, Mazaudier Christine A-, Minh LH. Ionospheric conductivity from the ionograms recorded at Phu Thuy, Hanoi. Vietnam J. Earth Sci. [Internet]. 2013 Mar. 14 [cited 2026 Apr. 2];34(4):524-3. Available from: https://cip.vast.vn/jse/article/view/2812