%0 Journal Article %A Duchamp, G. %A Krob, D. %A Vassilieva, E.A. %T Zassenhaus Lie idempotents, $q$-bracketing and a new exponential/logarithm correspondence %J Journal of Algebraic Combinatorics %D 2000 %P 251-277 %V 12 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/JAC_2000__12_3_a2/ %G en %F JAC_2000__12_3_a2