%0 Journal Article %A I. M. Gel'fand %A Yu. I. Manin %A M. A. Shubin %T Poisson brackets and the kernel of the variational derivative in the formal calculus of variations %J Funkcionalʹnyj analiz i ego priloženiâ %D 1976 %P 30-34 %V 10 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1976_10_4_a2/ %G ru %F FAA_1976_10_4_a2