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“Features of annual and semiannual variations derived from the global ionospheric maps of total electron content”, in Annales Geophysicae, 2008.
, “Far-ultraviolet signature of polar cusp during southward IMF Bz observed by TIMED/Global Ultraviolet Imager and DMSP”, Journal of Geophysical Research: Space Physics (1978–2012), vol. 110, 2005.
, “Solar EUV irradiance variability derived from terrestrial far ultraviolet dayglow observations”, Geophysical research letters, vol. 31, 2004.
, “Initial observations with the Global Ultraviolet Imager (GUVI) in the NASA TIMED satellite mission”, Journal of Geophysical Research: Space Physics (1978–2012), vol. 108, 2003.