1. Abramowitz, M., , , and I. A., Stegun, , , Handbook of Mathematical Functions, , sect. 9, National Bureau of Standards, , Washington, D.C., , 1964, .
2. Alfven, H., , C.-G., Falthammar, , Cosmical Electrodynamics, 180 Oxford at the Clarendon Press, London, 1963,
3. Return-stroke transmission line model;Baker,1990
4. Spectral intensities emitted by lightning discharges;Barasch;J. Geophys. Res.,1970
5. Very low frequency noise power from the lightning discharge;Barlow;J. Franklin Inst.,1954