1. Ballester, J. L.: 1994,Proceedings of the Third SOHO Workshop, Estes Park, September 1994, in press.
2. Burkepile, J. T. and St. Cyr, O. C.: 1993, MC AR/TN-369+STR.
3. Dermendjiev, V. N., Mouradian, Z., Duhlev, P., and Leroy, J. L.: 1994,Solar Phys.
149, 267.
4. Démoulin, P. and Vial, J. C.: 1992,Solar Phys.
141, 289.
5. Eddy, J. A.: 1979,A New Sun, The Solar Results from Skylab, NASA, SP-402, Washington, D.C.