1. Balmaceda, L.A., Solanki, S.K., Krivova, N.A., Foster, S.: 1976, J. Geophys. Res.
114, A07104.
DOI
.
ADS
.
2. Baranyi, T., Győri, L., Ludmány, A.: 2015 In: IAU General Assembly, 2257669.
ADS
.
3. Baranyi, T., Győri, L., Ludmány, A., Coffey, H.E.: 2001, Mon. Not. Roy. Astron. Soc.
323, 223.
DOI
.
ADS
.
4. Carrington, R.C.: 1969, Observations of the spots on the Sun from November 9, 1853, to March 24, 1861, made at Redhill. [M]. Readex Microprint.
5. Clette, F., Svalgaard, L., Vaquero, J.M., Cliver, E.W.: 2014, Space Sci. Rev.
186, 35.
DOI
.
ADS
.