1. Bocchialini, K., Vial, J.-C., Koutchmy, S. 1994, ApJ, 423, L67
2. Carlsson, M., Judge, P. G., Wilhelm, K. 1997, ApJ, 486, L63
3. Carlsson, M., Stein, R. F. 1992, ApJ, 397, L59
4. Carlsson, M., Stein, R. F. 1994, in M. Carlsson (ed.), Proc. Mini-Workshop on Chromospheric Dynamics, Institute of Theoretical Astrophysics, Oslo, p. 47
5. Carlsson, M., Stein, R. F. 1995, ApJ, 440, L29