@article{GFA_1996__6_1_58246,
     author = {L. Polterovich},
     title = {Gromov's {K-Area} and {Symplectic} {Rigidity.}},
     journal = {Geometric and functional analysis},
     pages = {726--739},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1996},
     zbl = {0873.58037},
     url = {http://geodesic.mathdoc.fr/item/GFA_1996__6_1_58246/}
}