Warnant, R., U. Foelsche, M. Aquino, B. Bidaine, V. Gherm, M. M. Hoque, I. Kutiev, S. Lejeune, J.-P. Luntama, J. Spits, H. J. Strangeways, G. Wautelet, N. Zernov, and N. Jakowski. “Mitigation of Ionospheric Effects on GNSS”. Annals of Geophysics, vol. 52, no. 3-4, Apr. 2009, pp. 373-90, doi:10.4401/ag-4585.