%0 Article %J Physics of the Earth and Planetary Interiors %D 2009 %T Dipole collapse and reversal precursors in a numerical dynamo %A Olson, P. %A Driscoll, P. %A Amit, H. %N 1-2 %P 121--140 %V 173 %1 10.1016/j.pepi.2008.11.010 %K MAG