Advances in Space Research · 2012 · 46 citations · 43 references
Natural SciencesAstronomyPhysicsAstrophysicsSolar AstronomySolar Active RegionsSolar ChromosphereSolar CoronaSolar OscillationsSolar PhysicsSolar ProminencesCoronal Plasma DynamicsCoronal TransientsCoronal WavesSunspot Number
43
The Magnetic Polarity of Sun-Spots
George E. Hale, Ferdinand Ellerman, Seth B. Nicholson et al. · The Astrophysical Journal · 1919 · 810 citations
Natural Sciences, Astronomy, Physics +10
Group Sunspot Numbers: A New Solar Activity Reconstruction
Douglas V. Hoyt, Kenneth H. Schatten · Solar Physics · 1998 · 628 citations