@article{Bergeot:1404,
      author        = "Bergeot, N. and Legrand, Juliette and Burston, R. and
                       Bruyninx, C. and Defraigne, P. and Chevalier, J. and
                       Clette, F. and Marqué, C. and Lefèvre, L.",
      title         = "{Correlation between solar activity and Earth s
                       ionospheric electron content during the 23rd solar cycle}",
      year          = "2010",
}