Beryllium-10 exposure ages of erratic boulders in southern Norway and implications for the history of the Fennoscandian Ice Sheet, Goehring, B. M.; Brook, E. J.; Linge, H.; Ralsbeck, G. M.; Yiou, F. , Quaternary Science Reviews, Feb, Volume 27, Issue 3-4, p.320-336, (2008), DOI 10.1016/j.quascirev.2007.11.004 Abstract