%0 Journal Article %A M. N. Demchenko %T On a partially isometric transform of divergence free vector fields %J Zapiski Nauchnykh Seminarov POMI %D 2009 %P 22-43 %V 370 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2009_370_a1/ %G ru %F ZNSL_2009_370_a1