, Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany

• Annals of Geophysics Vol. 55 No. 1 (2012) - EARTHQUAKE PRECURSORS / Special Issue ed. by P.F. Biagi, M.E. Contadakis, M. Hayakawa and T. Maggipinto
  Midnight variations of spreading of ionospheric sporadic E-layers before earthquakes
  Abstract  PDF