%0 Journal Article
%A S. K. Smirnov
%A V. P. Havin
%T Approximation and extension problems for some classes of vector fields
%J Algebra i analiz
%D 1998
%P 133-162
%V 10
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AA_1998_10_3_a5/
%G ru
%F AA_1998_10_3_a5