1. Amari, T. and Aly, J. J.: 1989, Astron. Astrophys. 208, 261.
2. Anzer, U.: 1989, in E. R. Priest (ed.), Dynamics and Structure of Quiescent Solar Prominences, Kluwer Academic Publishers, Dordrecht, The Netherlands, Ch. 6.
3. Biskamp, D. and Welter, H.: 1989, Solar Phys. 120, 49.
4. Browning, P. K. and Priest, E. R.: 1986, Solar Phys. 106, 335.
5. Demoulin, P. K. and Priest, E. R.: 1988, Astron. Astrophys. 206, 336.