1. Abdussamatov, H.I.: 1980, Soln. Dannye No. 11, 99.
2. Adjabshirzadeh, A., Koutchmy, S.: 1980, Astron. Astrophys. 89, 88.
3. Adjabshirzadeh, A., Koutchmy, S.: 1982, Solar Phys. 75, 71.
4. Adjabshirzadeh, A., Koutchmy, S.: 1983, Astron. Astrophys. 122, 1.
5. Albregtsen, F., Joras, P.B., Maltby, P.: 1984, Solar Phys. 90, 17.