Ataç, T., Özgüç, A. 1996,Solar Phys.,166, 201.
Ataç, T., Özgüç, A. 2001,Solar Phys.,198, 399.
Garcia, H. A. 1990,Solar Phys.,127, 185.
Gnevyshev, M. N., Ohl, A. I. 1948,Astron Zh.,25, 18.
Gopalswamy, N., Lara, A., Yashiro, S., Howard, R. A. 2003,Astrophys. J.,598, L63.
Howard, R. 1974,Solar Phys.,38, 59.
Joshi, A. 1995,Solar Phys.,157, 315.
Joshi, B., Joshi, A. 2004,Solar Phys.,219, 343.
Joshi, B., Pant, P. 2005,Astron. Astrophys.,431, 359.
Kleczek, J. 1953,Publ. Astrophys. Obs. Czech. Acad. Sci., No.24, Prague.
Knaack, R., Stenflo, J. O., Berdyugina, S. V. 2004,Astron. Astrophys.,418, L17.
Knaack, R., Stenflo, J. O., Berdyugina, S. V. 2005,Astron. Astrophys.,438, 1067.
Komitov, B., Bonev, B. 2001,Astrophys. J.,554, L119.
Knoška, S. 1985,Contrib. Astron. Obs. Skalnaté Pleso,13, 217.
Li, K.-J., Schmieder, B., Li, Q. Sh. 1998,Astron. Astrophys.,131, 99.
Roy, J.-R. 1977,Solar Phys.,52, 53.
Swinson, D. B., Koyama, H., Saito, T. 1986,Solar Phys.,106, 35.
Temmer, M., Veronig, A., Hanslmeier, A., Otruba, W., Messerotti, M. 2001,Astron. Astrophys.,375, 1049.
Temmer, M. 2004, Ph.D. Thesis, Universitat Graz, Austria.
Verma, V. K. 1993,Astrophys. J.,403, 797.
Vizoso, G., Ballester, J. L. 1990,Astron. Astrophys.,229, 540.
