SCHUMANN RESONANCES AND THEIR PLAUSIBLE BIOPHYSICAL EFFECTS Neil Cherry Lincoln University, Canterbury, New Zealand "Natural Hazards", Vol.26, 279- 330, 2002 RESONANSES IN THE EARTH-IONOSPHERE CAVITY Nicolaenko A.P., Haykawa M. Kluwer Academic Publishers Modern Approaches in Geophysics, Vol.19, p.320, 2002