%0 Journal Article %A P. V. Paramonov %T Criteria for the individual $C^m$-approximability of~functions on compact subsets of~$\mathbb R^N$ by solutions of second-order homogeneous elliptic equations %J Sbornik. Mathematics %D 2018 %P 857-870 %V 209 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2018_209_6_a5/ %G en %F SM_2018_209_6_a5