Conference Paper
F. Becker-Guedes, Sahai, Y., Fagundes, P. R., Espinoza, E. S., Pillat, V. G., Lima, W. L. C., Basu, S., Basu, S., Otsuka, Y., Shiokawa, K., Mackenzie, E. M., and Bittencourt, J. A.,
“The ionospheric response in the Brazilian sector during the super geomagnetic storm on 20 November 2003”, in
Annales Geophysicae, 2007.
Y. Sahai, Becker-Guedes, F., Fagundes, P. R., Lima, W. L. C., De Abreu, A. J., Guarnieri, F. L., Candido, C. M. N., and Pillat, V. G.,
“Unusual ionospheric effects observed during the intense 28 October 2003 solar flare in the Brazilian sector”, in
Annales Geophysicae, 2008.
] 
