SINGH, C.; SINGH, O. P. Simultaneous ionospheric E- and F-layer perturbations caused by some major earthquakes in India. Annals of Geophysics, [S. l.], v. 50, n. 1, 2007. DOI: 10.4401/ag-3091. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3091. Acesso em: 5 dec. 2021.