1. Akimov, A.A., Ambro?, P., Belov, A.V.,et al.: 1995,Preprint of IAP, Bern, 44 p.;Solar Phys. (in press).
2. Chertok, I.M.: 1995, in T. Watanabe, ed,Proc. of the Second SOLTIP Symp., Ibaraki University, Mito, (in press).
3. Cliver, E.W., Kahler, S.W., and Vestrand, W.T.: 1993,23rd ICRC, Calgary,3, 91.
4. ?vestka, Z.: 1989,Solar Phys. 121, 399.
5. Torsti, J.J., Eronen, T., Mähönen, M., et al.: 1992, in E. Marsch and R. Schwenn, eds.,Solar Wind Seven, Pergamon Press, Oxford, 545.