Observations of the F-region ionospheric irregularities in the South American sector during the October 2003 "Halloween Storms"
Sahai, Y.; Becker Guedes, F.; Fagundes, P. R.; Abreu, A. J. de; Jesus, R. de; Pillat, V. G.; Abalde, J. R.; Martinis, C. R.; Brunini, Claudio Antonio; Gende, Mauricio; Huang, C. S.; Pi, X.; Lima, W. L. C.; Bittencourt, J. A.; Otsuka, Y. (2009)