D. Malan

Total electron content – A key parameter in propagation : measurement and use in ionospheric imaging

S. E. Pryse, L. Cander, C. Mitchell, 2006 .

Total electron content - A key parameterin propagation: measurement and usein ionospheric imaging

Ljiljana R. Cander, Cathryn N. Mitchell, Reinhart Leitinger, 2004 .

Parameterization of the main ionospheric trough in the European sector

Gregory Bishop, S. E. Pryse, L. Kersley, 2006 .