6 citations as recorded by crossref.

1. Geomagnetic variation peculiarities at middle latitudes of the East European Platform S. Riabova & A. Spivak https://doi.org/10.1134/S0016793217020128
2. The 27-Day Signal in Sunspot Number Series and the Solar Dynamo J. Le Mouël et al. https://doi.org/10.1007/s11207-007-9065-8
3. Long-term variation of the semiannual amplitude in the aa index A. Elias et al. https://doi.org/10.1016/j.jastp.2010.12.001
4. Singular Spectral Analysis of the aa and Dst Geomagnetic Indices J. Le Mouël et al. https://doi.org/10.1029/2019JA027040
5. Long-term climate change and surface versus underground temperature measurements in Paris F. Perrier et al. https://doi.org/10.1002/joc.1211
6. Geomagnetic observatory monthly series, 1930 to 2010: empirical analysis and unmodeled signal estimation J. Ou et al. https://doi.org/10.1186/s40623-014-0173-z