%0 Journal Article %A A. M. Vershik %A S. I. Karpushev %T Cohomology of groups in unitary representations, the neighborhood of the identity, and conditionally positive definite functions %J Sbornik. Mathematics %D 1984 %P 513-526 %V 47 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1984_47_2_a13/ %G en %F SM_1984_47_2_a13