1. Alania, M.V., Aslamazashvili, R.G., Bochorishvili, T.B., Iskra, K., Siluszyk, M.: 2001, Adv. Space Res. 27, 613.
2. Badruddin, A., Ananth, A.G.: 2003, Proc. 28th Int. Cosmic Ray Conf. 7, 3909.
3. Badruddin, A., Yadav, R.S., Yadav, N.R.: 1985, Planet. Space Sci. 33, 191.
4. Bieber, J.W., Chen, J.: 1991, Astrophys. J. 372, 301.
5. Burger, R.A.: 1987, On the theory and application of drift motion of charged particles in inhomogeneous magnetic fields. Ph.D. thesis, Potchefstroom University for Christian Higher Education, South Africa.