%0 Journal Article %A A. V. Fursikov %T Properties of solutions of some extremal problems connected with the Navier--Stokes system %J Sbornik. Mathematics %D 1983 %P 323-351 %V 46 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1983_46_3_a1/ %G en %F SM_1983_46_3_a1