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.

Bond G.C, Mandeville C., Hoffmann S..  2001.  Were Rhyolitic Glasses in the Vedde Ash and in the North Atlantic's Ash Zone 1 produced by the Same Volcanic Eruption? Quaternary Science Reviews. 20:118-1199.