1. L. Bergamasco, S. Alessio, G. Cini and A.R. Osborne, in: Proc. Intern. Cosmic Ray Conf., IUPAP. Kyoto 1979, 4, p. 163.
2. K. Fujimoto, K. Murakami, I. Kondo and K. Nagashima, in: Proc. of Intern. Cosmic Ray Symp. on High Energy Cosmic Ray Modulation, ed. C.R. Laboratory, University of Tokio, Japan 1976, p. 50.
3. S. Kudo, S. Mori, D.B. Swinson, S. Yasue and Y. Rue, in: Proc. 20th Intern. Cosmic Ray Conference, ed. IUPAP, Moscow 1987, 4, p. 140.
4. Fractal structure of the interplanetary magnetic field