Cyclic Behavior of the Sun's Small-scale Magnetic Elements

Cyclic Changes in Dust-to-Gas Ratio

Cyclic dependence of the brightness of quasars on the parameter ln (1 + z)

Cyclic fluctuations in the differential rotation of active stars

Cyclic Magnetic Field Reconnection

Cyclic Period Changes in the Algol WW Cygni

Cyclic Polarization in Venus Equatorial Zone

Cyclic polarization in Venus' equatorial zone

Cyclic solutions of the school-girl puzzle

Cyclic variability of UX Ori Stars: UX Ori, SV Cep, and RZ Psc

Cyclic Variation in the Spatial Distribution of the Coronal Green Line Brightness

Cyclic Variation of RS CVn Binaries, AR Lac and V711 Tau

Cyclic variation of the high-energy solar neutrino flux

Cyclic variations in the differential rotation of the solar corona

Cyclic variations of heliogeomagnetic activity manifested in variations of the zonal pressure gradient in the troposphere

Cyclic Variations of Orbital Period and Long-Term Luminosity in Close Binary RT Andromedae

Cyclical Period Changes in Short-Period Dwarf Novae

Cyclicity and NRM acquisition in the Armantes section (Miocene, Spain): Potential for an astronomical polarity time scale for the continental record

Cyclicity in Terrestrial Upheavals during the Phanerozoic Eon

Cyclicity in the variability of R Coronae Borealis