1. B.A. Khrenov, M.I. Panasyuk, for the Kosmotepetl collaboration, Workshop on Observing of Extremely High Energy Cosmic Ray from Earth and Space, In: AIP Conf. Proc., Melville, New York. 566, 2000, p. 57.
2. for the Kosmotepetl collaboration;Khrenov;Nucl. Phys. B (Proc. Suppl.),2001
3. Astrophysical quantities;Allen,1965
4. H. Christian, Global Lightning Observation, Seminar on Terrestrial Gamma Ray Flashes and Lightning, University of California, Berkley, February 15, 2005.