Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxima von Usoskin, I. G., Gallet, Y., Lopes, F., Kovaltsov, G. A., Hulot, G.

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Solar activity over nine millennia: A consistent multi-proxy reconstruction von Wu, C. J., Usoskin, I. G., Krivova, N., Kovaltsov, G. A., Baroni, M., Bard, E., Solanki, S. K.

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New reconstruction of event-integrated spectra (spectral fluences) for major solar energetic particle events von Koldobskiy, S., Raukunen, O., Vainio, R., Kovaltsov, G. A., Usoskin, I.

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Revised GLE database: Fluences of solar energetic particles as measured by the neutron-monitor network since 1956 von Usoskin, Koldobskiy, S., Kovaltsov, G. A., Gil, A., Usoskina, Willamo, T., Ibragimov, A.

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The AD775 cosmic event revisited: the Sun is to blame von Usoskin, I. G., Kromer, B., Ludlow, F., Beer, J., Friedrich, M., Kovaltsov, G. A., Solanki, S. K., Wacker, L.

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Grand minima and maxima of solar activity: new observational constraints von Usoskin, I. G., Solanki, S. K., Kovaltsov, G. A.

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A New Calibrated Sunspot Group Series Since 1749: Statistics of Active Day Fractions von Usoskin, I. G., Kovaltsov, G. A., Lockwood, M., Mursula, K., Owens, M., Solanki, S. K.

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Anisotropic Three-Dimensional Focused Transport of Solar Energetic Particles in the Inner Heliosphere von Dröge, W, Kartavykh, Y. Y, Klecker, B, Kovaltsov, G. A

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Neutron monitor yield function: New improved computations von Mishev, A. L., Usoskin, I. G., Kovaltsov, G. A.

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Evidence for distinct modes of solar activity von Usoskin, I. G., Hulot, G., Gallet, Y., Roth, R., Licht, A., Joos, F., Kovaltsov, G. A., Thébault, E., Khokhlov, A.

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Level and length of cyclic solar activity during the Maunder minimum as deduced from the active-day statistics von Vaquero, J. M., Kovaltsov, G. A., Usoskin, I. G., Carrasco, V. M. S., Gallego, M. C.

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Ionization of the Polar Atmosphere by Energetic Electron Precipitation Retrieved From Balloon Measurements von Mironova, I. A., Artamonov, A. A., Bazilevskaya, G. A., Rozanov, E. V., Kovaltsov, G. A., Makhmutov, V. S., Mishev, A. L., Karagodin, A. V.

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Dependence of the Sunspot-Group Size on the Level of Solar Activity and its Influence on the Calibration of Solar Observers von Usoskin, I. G., Kovaltsov, G. A., Chatzistergos, T.

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Occurrence Probability of Large Solar Energetic Particle Events: Assessment from Data on Cosmogenic Radionuclides in Lunar Rocks von Kovaltsov, G. A., Usoskin, I. G.

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A Test of the Active-Day Fraction Method of Sunspot Group Number Calibration: Dependence on the Level of Solar Activity von Willamo, T., Usoskin, I. G., Kovaltsov, G. A.

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Cosmic Ray Induced Ion Production in the Atmosphere von Bazilevskaya, G. A., Usoskin, I. G., Flückiger, E. O., Harrison, R. G., Desorgher, L., Bütikofer, R., Krainev, M. B., Makhmutov, V. S., Stozhkov, Y. I., Svirzhevskaya, A. K., Svirzhevsky, N. S., Kovaltsov, G. A.

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Ionization effect of solar particle GLE events in low and middle atmosphere von Usoskin, I. G., Kovaltsov, G. A., Mironova, I. A., Tylka, A. J., Dietrich, W. F.

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Possible effect of extreme solar energetic particle event of 20 January 2005 on polar stratospheric aerosols: direct observational evidence von Mironova, I. A, Usoskin, I. G, Kovaltsov, G. A, Petelina, S. V

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Cosmogenic Isotope Variability During the Maunder Minimum: Normal 11-year Cycles Are Expected von Poluianov, S. V., Usoskin, I. G., Kovaltsov, G. A.

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Updated sunspot group number reconstruction for 1749–1996 using the active day fraction method von Willamo, T., Usoskin, I. G., Kovaltsov, G. A.

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