Thompson L.G, Mosley-Thompson E., Davis M.E, Henderson K.A, Brecher H.H, Zagorodnov V.S, Mashiotta T.A, Lin P.N, Mikhalenko V.N, Hardy D.R et al..  2002.  Kilimanjaro ice core records: evidence of holocene climate change in tropical Africa. Science. 298(5593):589-93.

Bond G., Kromer B., Beer J., Muscheler R., Evans M.N, Showers W., Hoffmann S., Lotti-Bond R., Hajdas I., Bonani G..  2001.  Persistent solar influence on North Atlantic climate during the Holocene. Science. 294(5549):2130-6.