%0 Journal Article %A V. A. Smirnov %T Secondary operations in the homology of the operad $E$ %J Izvestiya. Mathematics %D 1993 %P 425-442 %V 40 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1993_40_2_a5/ %G en %F IM2_1993_40_2_a5