author        = "Warnant, R. and Bavier, M. and Lejeune, S. and Pottiaux,
                       E. and Andonov, B. and Kutiev, I. and Barre, A. and Nebdi,
                       H. and Rasson, J. and Van der Linden, R.A.M.",
      title         = "{Development of Space Weather related services for
                       real-time GPS applications in the frame of the SIDC Space
                       Weather Pilot Project}",
      year          = "2004",