TY - JOUR AU - P. V. Paramonov AU - K. Yu. Fedorovskiy TI - Uniform and $C^1$-approximability of functions on compact subsets of $\mathbb R^2$ by solutions of second-order elliptic equations JO - Sbornik. Mathematics PY - 1999 SP - 285 EP - 307 VL - 190 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1999_190_2_a5/ LA - en ID - SM_1999_190_2_a5 ER -