TY - JOUR AU - M. N. Demchenko TI - On a partially isometric transform of divergence free vector fields JO - Zapiski Nauchnykh Seminarov POMI PY - 2009 SP - 22 EP - 43 VL - 370 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_2009_370_a1/ LA - ru ID - ZNSL_2009_370_a1 ER -