%0 Journal Article %A I. K. Babenko %A S. A. Bogatyi %T On the group of substitutions of formal power series with integer coefficients %J Izvestiya. Mathematics %D 2008 %P 241-264 %V 72 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2008_72_2_a1/ %G en %F IM2_2008_72_2_a1