%0 Journal Article %A R. S. Egikyan %A D. V. Ktitarev %T Feynman's formula in phase space for systems of pseudodifferential equations with analytic symbols %J Matematičeskie zametki %D 1992 %P 44-50 %V 51 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1992_51_5_a5/ %G ru %F MZM_1992_51_5_a5