%0 Journal Article %A V. I. Man'ko %T Symplectic group and invariants of quantum systems %J Itogi nauki i tehniki. Seriâ, Matematičeskij analiz %D 1984 %P 59-100 %V 22 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTM_1984_22_a2/ %G ru %F INTM_1984_22_a2