A. T. Altynsev

Ionospheric effects of the solar flares as deduced from global GPS network data

L. A. Leonovich, E. Afraimovich, V. Grechnev, 2001, physics/0110063.

The response of the ionosphere to faint and bright solar flares as deduced from global GPS network data

L. A. Leonovich, Victor V. Grechnev, Edward L. Afraimovich, 2002 .