p. 38), they are of sufficient general importance to recall them. The notice in NATURE 15 headed “A 300-year Cycle in Solar Phenomena,” and refers to a discussion in the Astrophysical Journal ...
Aguilar et al, Antiprotons and Elementary Particles over a Solar Cycle: Results from the Alpha Magnetic Spectrometer, Physical Review Letters (2025). DOI: 10.1103/PhysRevLett.134.051002 M.