TY - JOUR AU - A. V. Bondarenko AU - A. V. Primak TI - Negative Results in Form-Preserving Approximation of Higher Order JO - Matematičeskie zametki PY - 2004 SP - 812 EP - 823 VL - 76 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2004_76_6_a1/ LA - ru ID - MZM_2004_76_6_a1 ER -