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- [28] SOLAR DYNAMICS OVER SOLAR CYCLE-21 USING SUNSPOTS AS TRACERS .1. SUNSPOT ROTATION ASTRONOMY & ASTROPHYSICS, 1993, 274 (02): : 563 - 570
- [30] FLARE ACTIVITY AND THE PROTON FLUXES IN THE NEAR AND DISTANT HELIOSPHERE IN SOLAR CYCLE-21 BULLETIN OF THE ASTRONOMICAL INSTITUTES OF CZECHOSLOVAKIA, 1990, 41 (04): : 251 - 252