%0 Journal Article %A D. G. Markushevich %T Completely integrable projective symplectic 4-dimensional varieties %J Izvestiya. Mathematics %D 1995 %P 159-187 %V 59 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1995_59_1_a6/ %G en %F IM2_1995_59_1_a6