Calogovic et al. (2010)
Also: Calogovic et al. 2010
Sudden cosmic ray decreases: No change of global cloud cover
Calogovic, J., Albert, C., Arnold, F., Beer, J., Desorgher, L. & Flueckiger, E. O. (2010). Sudden cosmic ray decreases: No change of global cloud cover. Geophysical Research Letters. 37(3),-. PDF
https://doi.org/10.1029/2009gl041327
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.