Subject
Space and Planetary Science,Astronomy and Astrophysics
Reference25 articles.
1. H. I. Abdussamatov, Solar Phys. 16, 384A (1971).
2. C. Beck, E. Khomenko, R. Rezaei, and M. Collados, Astron. Astrophys. 507, 453 (2009).
3. J. M. Beckers, Astrophys. J. 213, 900 (1977).
4. J.M. Beckers and E.H. Schröter, Solar Phys. 10, 384 (1969).
5. R. Bray and R. Loughhead, Sunspots (Chapman Hall, London, 1964).