Blecki, Jan, Małgorzata Kosciesza, Michel Parrot, Sergey Savin, and Roman Wronowski. 2012. “Extremely Low Frequency Plasma Turbulence Recorded by the DEMETER Satellite in the Ionosphere over the Abruzzi Region Prior to the April 6, 2009, L’Aquila Earthquake”. Annals of Geophysics 55 (1). https://doi.org/10.4401/ag-5356.