%0 Journal Article %A I. M. Prudnikov %T $C^2(D)$-integral approximation of nonsmooth functions conserving $\varepsilon(D)$-extremum points %J Trudy Instituta matematiki i mehaniki %D 2010 %P 159-169 %V 16 %N 5 %U http://geodesic.mathdoc.fr/item/TIMM_2010_16_5_a18/ %G ru %F TIMM_2010_16_5_a18