%0 Journal Article %A S. G. Pyatkov %T On the existence of maximal semidefinite invariant subspaces for $J$-dissipative operators %J Sbornik. Mathematics %D 2012 %P 234-256 %V 203 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2012_203_2_a4/ %G en %F SM_2012_203_2_a4