%0 Journal Article %A V. G. Ryabykh %T Approximation of non-analytic functions by analytic ones %J Sbornik. Mathematics %D 2006 %P 225-233 %V 197 %N 2 %U http://geodesic.mathdoc.fr/item/SM_2006_197_2_a5/ %G en %F SM_2006_197_2_a5