Bremer, J., Alfonsi, L., Bencze, P., Lastovicka, J., Mikhailov, A.V. and Rogers, N. 2004. Long-term trends in the ionosphere and upper atmosphere parameters. Annals of Geophysics. 47, 2-3 Sup. (Dec. 2004). DOI:https://doi.org/10.4401/ag-3283.