@article{IM2_1995_59_1_a6,
     author = {D. G. Markushevich},
     title = {Completely integrable projective symplectic 4-dimensional varieties},
     journal = {Izvestiya. Mathematics},
     pages = {159--187},
     year = {1995},
     volume = {59},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1995_59_1_a6/}
}