U
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.