HỒNG, Phạm Thị Thu; MAZAUDIER CHRISTINE, Amory-; MINH, Lê Huy. Ionospheric conductivity from the ionograms recorded at Phu Thuy, Hanoi. <b>Vietnam Journal of Earth Sciences</b>, <i>[S. l.]</i>, v. 34, n. 4, p. 524–534, 2013. DOI: 10.15625/0866-7187/34/4/2812. Disponível em: http://vjes.vast.vn/jse/article/view/2812. Acesso em: 8 nov. 2025.