1. S.D. Bloom, B.L. Berman, D.C. Hamilton, M.J. Alguard, J.H. Barrett, S. Datz, R.H. Pantell, R.L. Swent, Nucl. Instr. Meth. 194: 229 (1982).
2. O. Pedersen, E. Bonderup, F. Golovchenko, Nucl. Inst. Meth. B2: 83 (1984).
3. J. Bak, J.A. Ellison, B. Marsh, F.E. Meyer, O. Pedersen, F.B. Petersen, E. Uggerhoj, K. Ostergaard, S.P. Moller, A.H. Sorensen, M. Suffert, Ned. Phys. B254: 491 (1985).
4. L.D. Landau, E.M. Lifshitz, “Lehrbuch der theoretischen Physik Bd. II,” Klassische Feldtheorie, Academie-Verlag, Berlin (1981) S249.
5. S. Chandrasekar, Stochastic Problems in Physics and Astronomy, in: “Selected Papers on Noise and Stochastic Processes,” N. Wax, ed., Dover Publications, New York (1954).