TY - JOUR AU - Yu. A. Lysenko AU - B. M. Pisarevskii TI - Instability of harmonic capacity and approximations of continuous functions by harmonic functions JO - Sbornik. Mathematics PY - 1968 SP - 53 EP - 72 VL - 5 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1968_5_1_a3/ LA - en ID - SM_1968_5_1_a3 ER -