%0 Journal Article %A S. I. Pokhozhaev %T On~nonlinear operators having weakly closed range, and quasilinear elliptic equations %J Sbornik. Mathematics %D 1969 %P 227-250 %V 7 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1969_7_2_a3/ %G en %F SM_1969_7_2_a3