Found in articles
Jeffrey C.; Lockwood, G. W. (2000). "Evidence of a Pronounced Activity Cycle in the Solar Twin 18 Scorpii". The Astrophysical Journal. 545 (2): L43–L45. Bibcode:2000ApJ
Solar System (2 uitg.). Elsevier. p. 147. Valentina Zharkova; et al. (24 Junie 2019). "Oscillations of the baseline of solar magnetic field and solar
Claudia Kubatzki, Kurt Roth & Bernd Kromer: "Possible solar origin of the 1,470-year glacial climate cycle demonstrated in a coupled model". In: Nature. Vol
J. (12 Julie 2005). "Sun's retrograde motion and violation of even-odd cycle rule in sunspot activity". Monthly Notices of the Royal Astronomical Society
Pattiaratchi, C. (2011). "Global influences of the 18.61 year nodal cycle and 8.85 year cycle of lunar perigee on high tidal levels" (PDF). J. Geophys. Res