1. Arndt, M. B., Habbal, S. R., and Karovska, M.: 1994, Solar Phys. 150, 165.
2. Balasubramaniam, K. S. and Simon, G. W. (eds): 1994, Solar Active Region Evolution: Comparing Models and Observations, Astronomical Society of the Pacific Conference Series, Vol. 68.
3. Brosius, J. W., Davila, J. M., Thomas, R. J., Saba, J. L. R., Hara, H., aand Monsignori-Fossi, B. C.: 1996, Astrophys. J., submitted.
4. Brynildsen, N., Brekke, P., Fredvik, T., Haugan, S.V.H., Kjeldseth-Moe, O., Maltby, P., Rimmele, T., Harrison, R. A., Pike, C. D., Thompson, W., and Wilhelm, K.: 1998, Solar Phys., in press.
5. Dere, K. P.: 1982, Solar Phys. 75, 189.