Evolution and rotation of large-scale photospheric magnetic fields of the Sun during cycles 21–23 - Periodicities, north-south asymmetries and r-mode signaturesR. Knaack, J. O. Stenflo and S. V. BerdyuginaA&A, 438 3 (2005) 1067-1082DOI: https://doi.org/10.1051/0004-6361:20042091
